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[matrix] Diff of /pkg/Matrix/src/Csparse.c
 [matrix] / pkg / Matrix / src / Csparse.c

# Diff of /pkg/Matrix/src/Csparse.c

pkg/src/Csparse.c revision 2279, Fri Oct 3 09:15:54 2008 UTC pkg/Matrix/src/Csparse.c revision 3192, Tue Sep 27 13:23:32 2016 UTC
# Line 1  Line 1
1                          /* Sparse matrices in compressed column-oriented form */  /** @file Csparse.c
2     * The "CsparseMatrix" class from R package Matrix:
3     *
4     * Sparse matrices in compressed column-oriented form
5     */
6  #include "Csparse.h"  #include "Csparse.h"
7  #include "Tsparse.h"  #include "Tsparse.h"
8  #include "chm_common.h"  #include "chm_common.h"
# Line 32  Line 36
36      return TRUE;      return TRUE;
37  }  }
38
39  SEXP Csparse_validate(SEXP x)  SEXP Csparse_validate(SEXP x) {
40  {      return Csparse_validate_(x, FALSE);
/* NB: we do *NOT* check a potential 'x' slot here, at all */
SEXP pslot = GET_SLOT(x, Matrix_pSym),
islot = GET_SLOT(x, Matrix_iSym);
Rboolean sorted, strictly;
int j, k,
*dims = INTEGER(GET_SLOT(x, Matrix_DimSym)),
nrow = dims[0],
ncol = dims[1],
*xp = INTEGER(pslot),
*xi = INTEGER(islot);

if (length(pslot) != dims[1] + 1)
return mkString(_("slot p must have length = ncol(.) + 1"));
if (xp[0] != 0)
return mkString(_("first element of slot p must be zero"));
if (length(islot) < xp[ncol]) /* allow larger slots from over-allocation!*/
return
mkString(_("last element of slot p must match length of slots i and x"));
for (j = 0; j < xp[ncol]; j++) {
if (xi[j] < 0 || xi[j] >= nrow)
return mkString(_("all row indices must be between 0 and nrow-1"));
}
sorted = TRUE; strictly = TRUE;
for (j = 0; j < ncol; j++) {
if (xp[j] > xp[j + 1])
return mkString(_("slot p must be non-decreasing"));
if(sorted) /* only act if >= 2 entries in column j : */
for (k = xp[j] + 1; k < xp[j + 1]; k++) {
if (xi[k] < xi[k - 1])
sorted = FALSE;
else if (xi[k] == xi[k - 1])
strictly = FALSE;
}
41      }      }
if (!sorted) {
CHM_SP chx = (CHM_SP) alloca(sizeof(cholmod_sparse));
R_CheckStack();
as_cholmod_sparse(chx, x, FALSE, TRUE); /* includes cholmod_sort() ! */
/* as chx = AS_CHM_SP__(x)  but  ^^^^  sorting x in_place (no copying)*/
42
/* Now re-check that row indices are *strictly* increasing
* (and not just increasing) within each column : */
for (j = 0; j < ncol; j++) {
for (k = xp[j] + 1; k < xp[j + 1]; k++)
if (xi[k] == xi[k - 1])
return mkString(_("slot i is not *strictly* increasing inside a column (even after cholmod_sort)"));
}
43
44      } else if(!strictly) {  /* sorted, but not strictly */  #define _t_Csparse_validate
45          return mkString(_("slot i is not *strictly* increasing inside a column"));  #include "t_Csparse_validate.c"
46
47    #define _t_Csparse_sort
48    #include "t_Csparse_validate.c"
49
50    // R: .validateCsparse(x, sort.if.needed = FALSE) :
51    SEXP Csparse_validate2(SEXP x, SEXP maybe_modify) {
52        return Csparse_validate_(x, asLogical(maybe_modify));
53      }      }
54      return ScalarLogical(1);
55    // R: Matrix:::.sortCsparse(x) :
56    SEXP Csparse_sort (SEXP x) {
57       int ok = Csparse_sort_2(x, TRUE); // modifying x directly
58       if(!ok) warning(_("Csparse_sort(x): x is not a valid (apart from sorting) CsparseMatrix"));
59       return x;
60  }  }
61
62  SEXP Rsparse_validate(SEXP x)  SEXP Rsparse_validate(SEXP x)
# Line 133  Line 104
104      return ScalarLogical(1);      return ScalarLogical(1);
105  }  }
106
107    /** @brief From a CsparseMatrix, produce a dense one.
108  /* Called from ../R/Csparse.R : */   *
109  /* Can only return [dln]geMatrix (no symm/triang);   * Directly deals with symmetric, triangular and general.
110   * FIXME: replace by non-CHOLMOD code ! */   * Called from ../R/Csparse.R's  C2dense()
111  SEXP Csparse_to_dense(SEXP x)   *
112     * @param x a CsparseMatrix: currently all 9 of  "[dln][gst]CMatrix"
113     * @param symm_or_tri integer (NA, < 0, > 0, = 0) specifying the knowledge of the caller about x:
114     *      NA  : unknown => will be determined
115     *      = 0 : "generalMatrix" (not symm or tri);
116     *      < 0 : "triangularMatrix"
117     *      > 0 : "symmetricMatrix"
118     *
119     * @return a "denseMatrix"
120     */
121    SEXP Csparse_to_dense(SEXP x, SEXP symm_or_tri)
122  {  {
123      CHM_SP chxs = AS_CHM_SP__(x);      Rboolean is_sym, is_tri;
124      /* This loses the symmetry property, since cholmod_dense has none,      int is_sym_or_tri = asInteger(symm_or_tri),
125            ctype = 0; // <- default = "dgC"
126        static const char *valid[] = { MATRIX_VALID_Csparse, ""};
127        if(is_sym_or_tri == NA_INTEGER) { // find if  is(x, "symmetricMatrix") :
128            ctype = R_check_class_etc(x, valid);
129            is_sym = (ctype % 3 == 1);
130            is_tri = (ctype % 3 == 2);
131        } else {
132            is_sym = is_sym_or_tri > 0;
133            is_tri = is_sym_or_tri < 0;
134            // => both are FALSE  iff  is_.. == 0
135            if(is_sym || is_tri)
136                ctype = R_check_class_etc(x, valid);
137        }
138        CHM_SP chxs = AS_CHM_SP__(x);// -> chxs->stype = +- 1 <==> symmetric
139        R_CheckStack();
140        if(is_tri && *diag_P(x) == 'U') { // ==>  x := diagU2N(x), directly for chxs
141            CHM_SP eye = cholmod_speye(chxs->nrow, chxs->ncol, chxs->xtype, &c);
142            double one[] = {1, 0};
143            CHM_SP ans = cholmod_add(chxs, eye, one, one,
144                                     /* values: */ ((ctype / 3) != 2), // TRUE iff not "nMatrix"
145                                     TRUE, &c);
146            cholmod_free_sparse(&eye, &c);
147            chxs = cholmod_copy_sparse(ans, &c);
148            cholmod_free_sparse(&ans, &c);
149        }
150        /* The following loses the symmetry property, since cholmod_dense has none,
151       * BUT, much worse (FIXME!), it also transforms CHOLMOD_PATTERN ("n") matrices       * BUT, much worse (FIXME!), it also transforms CHOLMOD_PATTERN ("n") matrices
152       * to numeric (CHOLMOD_REAL) ones : */       * to numeric (CHOLMOD_REAL) ones {and we "revert" via chm_dense_to_SEXP()}: */
153      CHM_DN chxd = cholmod_sparse_to_dense(chxs, &c);      CHM_DN chxd = cholmod_sparse_to_dense(chxs, &c);
154        /* FIXME: The above FAILS for prod(dim(.)) > INT_MAX
155         * ----
156         * TODO: use cholmod_l_* but also the 'cl' global ==> many changes in chm_common.[ch]
157         * >>>>>>>>>>> TODO <<<<<<<<<<<<
158         * CHM_DN chxd = cholmod_l_sparse_to_dense(chxs, &cl); */
159        //                   ^^^ important when prod(dim(.)) > INT_MAX
160      int Rkind = (chxs->xtype == CHOLMOD_PATTERN)? -1 : Real_kind(x);      int Rkind = (chxs->xtype == CHOLMOD_PATTERN)? -1 : Real_kind(x);
R_CheckStack();
161
162      return chm_dense_to_SEXP(chxd, 1, Rkind, GET_SLOT(x, Matrix_DimNamesSym));      SEXP ans = chm_dense_to_SEXP(chxd, 1, Rkind, GET_SLOT(x, Matrix_DimNamesSym),
163                                     /* transp: */ FALSE);
164        // -> a [dln]geMatrix
165        if(is_sym) { // ==> want  [dln]syMatrix
166            const char cl1 = class_P(ans)[0];
167            PROTECT(ans);
168            SEXP aa = PROTECT(NEW_OBJECT(MAKE_CLASS((cl1 == 'd') ? "dsyMatrix" :
169                                                    ((cl1 == 'l') ? "lsyMatrix" : "nsyMatrix"))));
170            // No need to duplicate() as slots of ans are freshly allocated and ans will not be used
171            SET_SLOT(aa, Matrix_xSym,       GET_SLOT(ans, Matrix_xSym));
172            SET_SLOT(aa, Matrix_DimSym,     GET_SLOT(ans, Matrix_DimSym));
173            SET_SLOT(aa, Matrix_DimNamesSym,GET_SLOT(ans, Matrix_DimNamesSym));
174            SET_SLOT(aa, Matrix_uploSym, mkString((chxs->stype > 0) ? "U" : "L"));
175            UNPROTECT(2);
176            return aa;
177        }
178        else if(is_tri) { // ==> want  [dln]trMatrix
179            const char cl1 = class_P(ans)[0];
180            PROTECT(ans);
181            SEXP aa = PROTECT(NEW_OBJECT(MAKE_CLASS((cl1 == 'd') ? "dtrMatrix" :
182                                                    ((cl1 == 'l') ? "ltrMatrix" : "ntrMatrix"))));
183            // No need to duplicate() as slots of ans are freshly allocated and ans will not be used
184            SET_SLOT(aa, Matrix_xSym,       GET_SLOT(ans, Matrix_xSym));
185            SET_SLOT(aa, Matrix_DimSym,     GET_SLOT(ans, Matrix_DimSym));
186            SET_SLOT(aa, Matrix_DimNamesSym,GET_SLOT(ans, Matrix_DimNamesSym));
187            slot_dup(aa, x, Matrix_uploSym);
188            /* already by NEW_OBJECT(..) above:
189               SET_SLOT(aa, Matrix_diagSym, mkString("N")); */
190            UNPROTECT(2);
191            return aa;
192        }
193        else
194            return ans;
195  }  }
196
197  SEXP Csparse_to_nz_pattern(SEXP x, SEXP tri)  // FIXME: do not go via CHM (should not be too hard, to just *drop* the x-slot, right?
198    SEXP Csparse2nz(SEXP x, Rboolean tri)
199  {  {
200      CHM_SP chxs = AS_CHM_SP__(x);      CHM_SP chxs = AS_CHM_SP__(x);
201      CHM_SP chxcp = cholmod_copy(chxs, chxs->stype, CHOLMOD_PATTERN, &c);      CHM_SP chxcp = cholmod_copy(chxs, chxs->stype, CHOLMOD_PATTERN, &c);
int tr = asLogical(tri);
202      R_CheckStack();      R_CheckStack();
203
204      return chm_sparse_to_SEXP(chxcp, 1/*do_free*/,      return chm_sparse_to_SEXP(chxcp, 1/*do_free*/,
205                                tr ? ((*uplo_P(x) == 'U') ? 1 : -1) : 0,                                tri ? ((*uplo_P(x) == 'U') ? 1 : -1) : 0,
206                                0, tr ? diag_P(x) : "",                                /* Rkind: pattern */ 0,
207                                  /* diag = */ tri ? diag_P(x) : "",
208                                GET_SLOT(x, Matrix_DimNamesSym));                                GET_SLOT(x, Matrix_DimNamesSym));
209  }  }
210    SEXP Csparse_to_nz_pattern(SEXP x, SEXP tri)
211    {
212        int tr_ = asLogical(tri);
213        if(tr_ == NA_LOGICAL) {
214            warning(_("Csparse_to_nz_pattern(x, tri = NA): 'tri' is taken as TRUE"));
215            tr_ = TRUE;
216        }
217        return Csparse2nz(x, (Rboolean) tr_);
218    }
219
220    // n.CMatrix --> [dli].CMatrix  (not going through CHM!)
221    SEXP nz_pattern_to_Csparse(SEXP x, SEXP res_kind)
222    {
223        return nz2Csparse(x, asInteger(res_kind));
224    }
225
226    // n.CMatrix --> [dli].CMatrix  (not going through CHM!)
227    // NOTE: use chm_MOD_xtype(() to change type of  'cholmod_sparse' matrix
228    SEXP nz2Csparse(SEXP x, enum x_slot_kind r_kind)
229    {
230        const char *cl_x = class_P(x);
231        // quick check - if ok, fast
232        if(cl_x[0] != 'n' || cl_x[2] != 'C') {
233            // e.g. class = "A", from  setClass("A", contains = "ngCMatrix")
234            static const char *valid[] = { MATRIX_VALID_nCsparse, ""};
235            int ctype = R_check_class_etc(x, valid);
236            if(ctype < 0)
237                error(_("not a 'n.CMatrix'"));
238            else // fine : get a valid  cl_x  class_P()-like string :
239                cl_x = valid[ctype];
240        }
241        int nnz = LENGTH(GET_SLOT(x, Matrix_iSym));
242        SEXP ans;
243        char *ncl = alloca(strlen(cl_x) + 1); /* not much memory required */
244        strcpy(ncl, cl_x);
245        double *dx_x; int *ix_x;
246        ncl[0] = (r_kind == x_double ? 'd' :
247                  (r_kind == x_logical ? 'l' :
248                   /* else (for now):  r_kind == x_integer : */ 'i'));
249        PROTECT(ans = NEW_OBJECT(MAKE_CLASS(ncl)));
250        // create a correct 'x' slot:
251        switch(r_kind) {
252            int i;
253        case x_double: // 'd'
254            dx_x = REAL(ALLOC_SLOT(ans, Matrix_xSym, REALSXP, nnz));
255            for (i=0; i < nnz; i++) dx_x[i] = 1.;
256            break;
257        case x_logical: // 'l'
258            ix_x = LOGICAL(ALLOC_SLOT(ans, Matrix_xSym, LGLSXP, nnz));
259            for (i=0; i < nnz; i++) ix_x[i] = TRUE;
260            break;
261        case x_integer: // 'i'
262            ix_x = INTEGER(ALLOC_SLOT(ans, Matrix_xSym, INTSXP, nnz));
263            for (i=0; i < nnz; i++) ix_x[i] = 1;
264            break;
265
266        default:
267            error(_("nz2Csparse(): invalid/non-implemented r_kind = %d"),
268                  r_kind);
269        }
270
271        // now copy all other slots :
272        slot_dup(ans, x, Matrix_iSym);
273        slot_dup(ans, x, Matrix_pSym);
274        slot_dup(ans, x, Matrix_DimSym);
275        slot_dup(ans, x, Matrix_DimNamesSym);
276        if(ncl[1] != 'g') { // symmetric or triangular ...
277            slot_dup_if_has(ans, x, Matrix_uploSym);
278            slot_dup_if_has(ans, x, Matrix_diagSym);
279        }
280        UNPROTECT(1);
281        return ans;
282    }
283
284  SEXP Csparse_to_matrix(SEXP x)  SEXP Csparse_to_matrix(SEXP x, SEXP chk, SEXP symm)
285  {  {
286      return chm_dense_to_matrix(cholmod_sparse_to_dense(AS_CHM_SP__(x), &c),      int is_sym = asLogical(symm);
287                                 1 /*do_free*/, GET_SLOT(x, Matrix_DimNamesSym));      if(is_sym == NA_LOGICAL) { // find if  is(x, "symmetricMatrix") :
288            static const char *valid[] = { MATRIX_VALID_Csparse, ""};
289            int ctype = R_check_class_etc(x, valid);
290            is_sym = (ctype % 3 == 1);
291        }
292        return chm_dense_to_matrix(
293            cholmod_sparse_to_dense(AS_CHM_SP2(x, asLogical(chk)), &c),
294            1 /*do_free*/,
295            (is_sym
296             ? symmetric_DimNames(GET_SLOT(x, Matrix_DimNamesSym))
297             :                    GET_SLOT(x, Matrix_DimNamesSym)));
298    }
299
300    SEXP Csparse_to_vector(SEXP x)
301    {
302        return chm_dense_to_vector(cholmod_sparse_to_dense(AS_CHM_SP__(x), &c), 1);
303  }  }
304
305  SEXP Csparse_to_Tsparse(SEXP x, SEXP tri)  SEXP Csparse_to_Tsparse(SEXP x, SEXP tri)
# Line 183  Line 316
316                                 GET_SLOT(x, Matrix_DimNamesSym));                                 GET_SLOT(x, Matrix_DimNamesSym));
317  }  }
318
319  /* this used to be called  sCMatrix_to_gCMatrix(..)   [in ./dsCMatrix.c ]: */  SEXP Csparse_to_tCsparse(SEXP x, SEXP uplo, SEXP diag)
320    {
321        CHM_SP chxs = AS_CHM_SP__(x);
322        int Rkind = (chxs->xtype != CHOLMOD_PATTERN) ? Real_kind(x) : 0;
323        R_CheckStack();
324        return chm_sparse_to_SEXP(chxs, /* dofree = */ 0,
325                                  /* uploT = */ (*CHAR(asChar(uplo)) == 'U')? 1: -1,
326                                   Rkind, /* diag = */ CHAR(STRING_ELT(diag, 0)),
327                                   GET_SLOT(x, Matrix_DimNamesSym));
328    }
329
330    SEXP Csparse_to_tTsparse(SEXP x, SEXP uplo, SEXP diag)
331    {
332        CHM_SP chxs = AS_CHM_SP__(x);
333        CHM_TR chxt = cholmod_sparse_to_triplet(chxs, &c);
334        int Rkind = (chxs->xtype != CHOLMOD_PATTERN) ? Real_kind(x) : 0;
335        R_CheckStack();
336        return chm_triplet_to_SEXP(chxt, 1,
337                                  /* uploT = */ (*CHAR(asChar(uplo)) == 'U')? 1: -1,
338                                   Rkind, /* diag = */ CHAR(STRING_ELT(diag, 0)),
339                                   GET_SLOT(x, Matrix_DimNamesSym));
340    }
341
342
343  SEXP Csparse_symmetric_to_general(SEXP x)  SEXP Csparse_symmetric_to_general(SEXP x)
344  {  {
345      CHM_SP chx = AS_CHM_SP__(x), chgx;      CHM_SP chx = AS_CHM_SP__(x), chgx;
# Line 195  Line 351
351      chgx = cholmod_copy(chx, /* stype: */ 0, chx->xtype, &c);      chgx = cholmod_copy(chx, /* stype: */ 0, chx->xtype, &c);
352      /* xtype: pattern, "real", complex or .. */      /* xtype: pattern, "real", complex or .. */
353      return chm_sparse_to_SEXP(chgx, 1, 0, Rkind, "",      return chm_sparse_to_SEXP(chgx, 1, 0, Rkind, "",
354                                GET_SLOT(x, Matrix_DimNamesSym));                                symmetric_DimNames(GET_SLOT(x, Matrix_DimNamesSym)));
355  }  }
356
357  SEXP Csparse_general_to_symmetric(SEXP x, SEXP uplo)  SEXP Csparse_general_to_symmetric(SEXP x, SEXP uplo, SEXP sym_dmns)
358  {  {
359        int *adims = INTEGER(GET_SLOT(x, Matrix_DimSym)), n = adims[0];
360        if(n != adims[1]) {
361            error(_("Csparse_general_to_symmetric(): matrix is not square!"));
362            return R_NilValue; /* -Wall */
363        }
364      CHM_SP chx = AS_CHM_SP__(x), chgx;      CHM_SP chx = AS_CHM_SP__(x), chgx;
365      int uploT = (*CHAR(STRING_ELT(uplo,0)) == 'U') ? 1 : -1;      int uploT = (*CHAR(asChar(uplo)) == 'U') ? 1 : -1;
366      int Rkind = (chx->xtype != CHOLMOD_PATTERN) ? Real_kind(x) : 0;      int Rkind = (chx->xtype != CHOLMOD_PATTERN) ? Real_kind(x) : 0;
367      R_CheckStack();      R_CheckStack();

368      chgx = cholmod_copy(chx, /* stype: */ uploT, chx->xtype, &c);      chgx = cholmod_copy(chx, /* stype: */ uploT, chx->xtype, &c);
369
370        SEXP dns = GET_SLOT(x, Matrix_DimNamesSym);
371        if(asLogical(sym_dmns))
372            dns = symmetric_DimNames(dns);
373        else if((!isNull(VECTOR_ELT(dns, 0)) &&
374                 !isNull(VECTOR_ELT(dns, 1))) ||
375                !isNull(getAttrib(dns, R_NamesSymbol))) {
376            /* symmetrize them if both are not NULL
377             * or names(dimnames(.)) is asymmetric : */
378            dns = PROTECT(duplicate(dns));
379            if(!equal_string_vectors(VECTOR_ELT(dns, 0),
380                                     VECTOR_ELT(dns, 1))) {
381                if(uploT == 1)
382                    SET_VECTOR_ELT(dns, 0, VECTOR_ELT(dns,1));
383                else
384                    SET_VECTOR_ELT(dns, 1, VECTOR_ELT(dns,0));
385            }
386            SEXP nms_dns = getAttrib(dns, R_NamesSymbol);
387            if(!isNull(nms_dns) &&  // names(dimnames(.)) :
388               !R_compute_identical(STRING_ELT(nms_dns, 0),
389                                    STRING_ELT(nms_dns, 1), 16)) {
390                if(uploT == 1)
391                    SET_STRING_ELT(nms_dns, 0, STRING_ELT(nms_dns,1));
392                else
393                    SET_STRING_ELT(nms_dns, 1, STRING_ELT(nms_dns,0));
394                setAttrib(dns, R_NamesSymbol, nms_dns);
395            }
396            UNPROTECT(1);
397        }
398      /* xtype: pattern, "real", complex or .. */      /* xtype: pattern, "real", complex or .. */
399      return chm_sparse_to_SEXP(chgx, 1, 0, Rkind, "",      return chm_sparse_to_SEXP(chgx, 1, 0, Rkind, "", dns);
GET_SLOT(x, Matrix_DimNamesSym));
400  }  }
401
402  SEXP Csparse_transpose(SEXP x, SEXP tri)  SEXP Csparse_transpose(SEXP x, SEXP tri)
# Line 225  Line 413
413      tmp = VECTOR_ELT(dn, 0);    /* swap the dimnames */      tmp = VECTOR_ELT(dn, 0);    /* swap the dimnames */
414      SET_VECTOR_ELT(dn, 0, VECTOR_ELT(dn, 1));      SET_VECTOR_ELT(dn, 0, VECTOR_ELT(dn, 1));
415      SET_VECTOR_ELT(dn, 1, tmp);      SET_VECTOR_ELT(dn, 1, tmp);
416        if(!isNull(tmp = getAttrib(dn, R_NamesSymbol))) { // swap names(dimnames(.)):
417            SEXP nms_dns = PROTECT(allocVector(VECSXP, 2));
418            SET_VECTOR_ELT(nms_dns, 1, STRING_ELT(tmp, 0));
419            SET_VECTOR_ELT(nms_dns, 0, STRING_ELT(tmp, 1));
420            setAttrib(dn, R_NamesSymbol, nms_dns);
421            UNPROTECT(1);
422        }
423      UNPROTECT(1);      UNPROTECT(1);
424      return chm_sparse_to_SEXP(chxt, 1, /* SWAP 'uplo' for triangular */      return chm_sparse_to_SEXP(chxt, 1, /* SWAP 'uplo' for triangular */
425                                tr ? ((*uplo_P(x) == 'U') ? -1 : 1) : 0,                                tr ? ((*uplo_P(x) == 'U') ? -1 : 1) : 0,
426                                Rkind, tr ? diag_P(x) : "", dn);                                Rkind, tr ? diag_P(x) : "", dn);
427  }  }
428
429  SEXP Csparse_Csparse_prod(SEXP a, SEXP b)  /** @brief  A %*% B  - for matrices of class CsparseMatrix (R package "Matrix")
430     *
431     * @param a
432     * @param b
433     * @param bool_arith
434     *
435     * @return
436     *
437     * NOTA BENE:  cholmod_ssmult(A,B, ...) ->  ./CHOLMOD/MatrixOps/cholmod_ssmult.c
438     * ---------  computes a patter*n* matrix __always_ when
439     * *one* of A or B is pattern*n*, because of this (line 73-74):
440       ---------------------------------------------------------------------------
441        values = values &&
442            (A->xtype != CHOLMOD_PATTERN) && (B->xtype != CHOLMOD_PATTERN) ;
443       ---------------------------------------------------------------------------
444     * ==> Often need to copy the patter*n* to a *l*ogical matrix first !!!
445     */
446    SEXP Csparse_Csparse_prod(SEXP a, SEXP b, SEXP bool_arith)
447  {  {
448      CHM_SP      CHM_SP
449          cha = AS_CHM_SP(a),          cha = AS_CHM_SP(a),
450          chb = AS_CHM_SP(b),          chb = AS_CHM_SP(b), chc;
451          chc = cholmod_ssmult(cha, chb, /*out_stype:*/ 0,      R_CheckStack();
452                               cha->xtype, /*out sorted:*/ 1, &c);      static const char *valid_tri[] = { MATRIX_VALID_tri_Csparse, "" };
const char *cl_a = class_P(a), *cl_b = class_P(b);
453      char diag[] = {'\0', '\0'};      char diag[] = {'\0', '\0'};
454      int uploT = 0;      int uploT = 0, nprot = 1,
455      SEXP dn = allocVector(VECSXP, 2);          do_bool = asLogical(bool_arith); // TRUE / NA / FALSE
456        Rboolean
457            a_is_n = (cha->xtype == CHOLMOD_PATTERN),
458            b_is_n = (chb->xtype == CHOLMOD_PATTERN),
459            force_num = (do_bool == FALSE),
460            maybe_bool= (do_bool == NA_LOGICAL);
461
462    #ifdef DEBUG_Matrix_verbose
463        Rprintf("DBG Csparse_C*_prod(%s, %s)\n", class_P(a), class_P(b));
464    #endif
465
466        if(a_is_n && (force_num || (maybe_bool && !b_is_n))) {
467            /* coerce 'a' to  double;
468             * have no CHOLMOD function (pattern -> logical) --> use "our" code */
469            SEXP da = PROTECT(nz2Csparse(a, x_double)); nprot++;
470            cha = AS_CHM_SP(da);
471      R_CheckStack();      R_CheckStack();
472            a_is_n = FALSE;
473        }
474        else if(b_is_n && (force_num || (maybe_bool && !a_is_n))) {
475            // coerce 'b' to  double
476            SEXP db = PROTECT(nz2Csparse(b, x_double)); nprot++;
477            chb = AS_CHM_SP(db);
478            R_CheckStack();
479            b_is_n = FALSE;
480        }
481        chc = cholmod_ssmult(cha, chb, /*out_stype:*/ 0,
482                             /* values : */ do_bool != TRUE,
483                             /* sorted = TRUE: */ 1, &c);
484
485      /* Preserve triangularity and even unit-triangularity if appropriate.      /* Preserve triangularity and even unit-triangularity if appropriate.
486       * Note that in that case, the multiplication itself should happen       * Note that in that case, the multiplication itself should happen
487       * faster.  But there's no support for that in CHOLMOD */       * faster.  But there's no support for that in CHOLMOD */
488
489      /* UGLY hack -- rather should have (fast!) C-level version of      if(R_check_class_etc(a, valid_tri) >= 0 &&
490       *       is(a, "triangularMatrix") etc */         R_check_class_etc(b, valid_tri) >= 0)
if (cl_a[1] == 't' && cl_b[1] == 't')
/* FIXME: fails for "Cholesky","BunchKaufmann"..*/
491          if(*uplo_P(a) == *uplo_P(b)) { /* both upper, or both lower tri. */          if(*uplo_P(a) == *uplo_P(b)) { /* both upper, or both lower tri. */
492              uploT = (*uplo_P(a) == 'U') ? 1 : -1;              uploT = (*uplo_P(a) == 'U') ? 1 : -1;
493              if(*diag_P(a) == 'U' && *diag_P(b) == 'U') { /* return UNIT-triag. */              if(*diag_P(a) == 'U' && *diag_P(b) == 'U') { /* return UNIT-triag. */
# Line 261  Line 497
497              }              }
498              else diag[0]= 'N';              else diag[0]= 'N';
499          }          }
500
501        SEXP dn = PROTECT(allocVector(VECSXP, 2));
502      SET_VECTOR_ELT(dn, 0,       /* establish dimnames */      SET_VECTOR_ELT(dn, 0,       /* establish dimnames */
503                     duplicate(VECTOR_ELT(GET_SLOT(a, Matrix_DimNamesSym), 0)));                     duplicate(VECTOR_ELT(GET_SLOT(a, Matrix_DimNamesSym), 0)));
504      SET_VECTOR_ELT(dn, 1,      SET_VECTOR_ELT(dn, 1,
505                     duplicate(VECTOR_ELT(GET_SLOT(b, Matrix_DimNamesSym), 1)));                     duplicate(VECTOR_ELT(GET_SLOT(b, Matrix_DimNamesSym), 1)));
506        UNPROTECT(nprot);
507      return chm_sparse_to_SEXP(chc, 1, uploT, /*Rkind*/0, diag, dn);      return chm_sparse_to_SEXP(chc, 1, uploT, /*Rkind*/0, diag, dn);
508  }  }
509
510  SEXP Csparse_Csparse_crossprod(SEXP a, SEXP b, SEXP trans)  /** @brief [t]crossprod (<Csparse>, <Csparse>)
511     *
512     * @param a a "CsparseMatrix" object
513     * @param b a "CsparseMatrix" object
514     * @param trans trans = FALSE:  crossprod(a,b)
515     *              trans = TRUE : tcrossprod(a,b)
516     * @param bool_arith logical (TRUE / NA / FALSE): Should boolean arithmetic be used.
517     *
518     * @return a CsparseMatrix, the (t)cross product of a and b.
519     */
520    SEXP Csparse_Csparse_crossprod(SEXP a, SEXP b, SEXP trans, SEXP bool_arith)
521  {  {
522      int tr = asLogical(trans);      int tr = asLogical(trans), nprot = 1,
523            do_bool = asLogical(bool_arith); // TRUE / NA / FALSE
524      CHM_SP      CHM_SP
525          cha = AS_CHM_SP(a),          cha = AS_CHM_SP(a),
526          chb = AS_CHM_SP(b),          chb = AS_CHM_SP(b),
527          chTr, chc;          chTr, chc;
528      const char *cl_a = class_P(a), *cl_b = class_P(b);      R_CheckStack();
529        static const char *valid_tri[] = { MATRIX_VALID_tri_Csparse, "" };
530      char diag[] = {'\0', '\0'};      char diag[] = {'\0', '\0'};
531      int uploT = 0;      int uploT = 0;
532      SEXP dn = allocVector(VECSXP, 2);      Rboolean
533            a_is_n = (cha->xtype == CHOLMOD_PATTERN),
534            b_is_n = (chb->xtype == CHOLMOD_PATTERN),
535            force_num = (do_bool == FALSE),
536            maybe_bool= (do_bool == NA_LOGICAL);
537
538        if(a_is_n && (force_num || (maybe_bool && !b_is_n))) {
539            // coerce 'a' to  double
540            SEXP da = PROTECT(nz2Csparse(a, x_double)); nprot++;
541            cha = AS_CHM_SP(da);
542      R_CheckStack();      R_CheckStack();
543            // a_is_n = FALSE;
544        }
545        else if(b_is_n && (force_num || (maybe_bool && !a_is_n))) {
546            // coerce 'b' to  double
547            SEXP db = PROTECT(nz2Csparse(b, x_double)); nprot++;
548            chb = AS_CHM_SP(db);
549            R_CheckStack();
550            // b_is_n = FALSE;
551        }
552        else if(do_bool == TRUE) { // Want boolean arithmetic: sufficient if *one* is pattern:
553            if(!a_is_n && !b_is_n) {
554                // coerce 'a' to pattern
555                SEXP da = PROTECT(Csparse2nz(a, /* tri = */
556                                             R_check_class_etc(a, valid_tri) >= 0)); nprot++;
557                cha = AS_CHM_SP(da);
558                R_CheckStack();
559                // a_is_n = TRUE;
560            }
561        }
562      chTr = cholmod_transpose((tr) ? chb : cha, chb->xtype, &c);      chTr = cholmod_transpose((tr) ? chb : cha, chb->xtype, &c);
563      chc = cholmod_ssmult((tr) ? cha : chTr, (tr) ? chTr : chb,      chc = cholmod_ssmult((tr) ? cha : chTr, (tr) ? chTr : chb,
564                           /*out_stype:*/ 0, cha->xtype, /*out sorted:*/ 1, &c);                           /*out_stype:*/ 0, /* values : */ do_bool != TRUE,
565                             /* sorted = TRUE: */ 1, &c);
566      cholmod_free_sparse(&chTr, &c);      cholmod_free_sparse(&chTr, &c);
567
568      /* Preserve triangularity and unit-triangularity if appropriate;      /* Preserve triangularity and unit-triangularity if appropriate;
569       * see Csparse_Csparse_prod() for comments */       * see Csparse_Csparse_prod() for comments */
570      if (cl_a[1] == 't' && cl_b[1] == 't')      if(R_check_class_etc(a, valid_tri) >= 0 &&
571           R_check_class_etc(b, valid_tri) >= 0)
572          if(*uplo_P(a) != *uplo_P(b)) { /* one 'U', the other 'L' */          if(*uplo_P(a) != *uplo_P(b)) { /* one 'U', the other 'L' */
573              uploT = (*uplo_P(b) == 'U') ? 1 : -1;              uploT = (*uplo_P(b) == 'U') ? 1 : -1;
574              if(*diag_P(a) == 'U' && *diag_P(b) == 'U') { /* return UNIT-triag. */              if(*diag_P(a) == 'U' && *diag_P(b) == 'U') { /* return UNIT-triag. */
# Line 298  Line 578
578              else diag[0]= 'N';              else diag[0]= 'N';
579          }          }
580
581        SEXP dn = PROTECT(allocVector(VECSXP, 2));
582      SET_VECTOR_ELT(dn, 0,       /* establish dimnames */      SET_VECTOR_ELT(dn, 0,       /* establish dimnames */
583                     duplicate(VECTOR_ELT(GET_SLOT(a, Matrix_DimNamesSym), (tr) ? 0 : 1)));                     duplicate(VECTOR_ELT(GET_SLOT(a, Matrix_DimNamesSym),
584                                            (tr) ? 0 : 1)));
585      SET_VECTOR_ELT(dn, 1,      SET_VECTOR_ELT(dn, 1,
586                     duplicate(VECTOR_ELT(GET_SLOT(b, Matrix_DimNamesSym), (tr) ? 0 : 1)));                     duplicate(VECTOR_ELT(GET_SLOT(b, Matrix_DimNamesSym),
587                                            (tr) ? 0 : 1)));
588        UNPROTECT(nprot);
589      return chm_sparse_to_SEXP(chc, 1, uploT, /*Rkind*/0, diag, dn);      return chm_sparse_to_SEXP(chc, 1, uploT, /*Rkind*/0, diag, dn);
590  }  }
591
592  SEXP Csparse_dense_prod(SEXP a, SEXP b)  /**
593     * All (dense * sparse)  Matrix products and cross products
594     *
595     *   f( f(<Csparse>)  %*%  f(<dense>) )   where  f ()  is either t () [tranpose] or the identity.
596     *
597     * @param a CsparseMatrix  (n x m)
598     * @param b numeric vector, matrix, or denseMatrix (m x k) or (k x m)  if `transp` is '2' or 'B'
599     * @param transp character.
600     *        = " " : nothing transposed {apart from a}
601     *        = "2" : "transpose 2nd arg": use  t(b) instead of b (= 2nd argument)
602     *        = "c" : "transpose c":       Return  t(c) instead of c
603     *        = "B" : "transpose both":    use t(b) and return t(c) instead of c
604     * NB: For "2", "c", "B", need to transpose a *dense* matrix, B or C --> chm_transpose_dense()
605     *
606     * @return a dense matrix, the matrix product c = g(a,b) :
607     *
608     *                                                Condition (R)   Condition (C)
609     *   R notation            Math notation          cross  transp   t.a t.b t.ans
610     *   ~~~~~~~~~~~~~~~~~     ~~~~~~~~~~~~~~~~~~     ~~~~~~~~~~~~~   ~~~~~~~~~~~~~
611     *   c <-   a %*%   b      C :=      A B            .       " "    .   .   .
612     *   c <-   a %*% t(b)     C :=      A B'           .       "2"    .   |   .
613     *   c <- t(a %*%   b)     C := (A B)'  = B'A'      .       "c"    .   .   |
614     *   c <- t(a %*% t(b))    C := (A B')' = B A'      .       "B"    .   |   |
615     *
616     *   c <-   t(a) %*%   b   C :=      A'B           TRUE     " "    |   .   .
617     *   c <-   t(a) %*% t(b)  C :=      A'B'          TRUE     "2"    |   |   .
618     *   c <- t(t(a) %*%   b)  C := (A'B)'  = B'A      TRUE     "c"    |   .   |
619     *   c <- t(t(a) %*% t(b)) C := (A'B')' = B A      TRUE     "B"    |   |   |
620     */
621    SEXP Csp_dense_products(SEXP a, SEXP b,
622                            Rboolean transp_a, Rboolean transp_b, Rboolean transp_ans)
623  {  {
624      CHM_SP cha = AS_CHM_SP(a);      CHM_SP cha = AS_CHM_SP(a);
625      SEXP b_M = PROTECT(mMatrix_as_dgeMatrix(b));      int a_nc = transp_a ? cha->nrow : cha->ncol,
626      CHM_DN chb = AS_CHM_DN(b_M);          a_nr = transp_a ? cha->ncol : cha->nrow;
627      CHM_DN chc = cholmod_allocate_dense(cha->nrow, chb->ncol, cha->nrow,      Rboolean
628                                          chb->xtype, &c);          maybe_transp_b = (a_nc == 1),
629      SEXP dn = PROTECT(allocVector(VECSXP, 2));          b_is_vector = FALSE;
630      double one[] = {1,0}, zero[] = {0,0};      /* NOTE: trans_b {<--> "use t(b) instead of b" }
631           ----  "interferes" with the  case automatic treatment of *vector* b.
632           In that case,  t(b) or b is used "whatever make more sense",
633           according to the general R philosophy of treating vectors in matrix products.
634        */
635
636        /* repeating a "cheap part" of  mMatrix_as_dgeMatrix2(b, .)  to see if
637         * we have a vector that we might 'transpose_if_vector' : */
638        static const char *valid[] = {"_NOT_A_CLASS_", MATRIX_VALID_ddense, ""};
639        /* int ctype = R_check_class_etc(b, valid);
640         * if (ctype > 0)   /.* a ddenseMatrix object */
641        if (R_check_class_etc(b, valid) < 0) {
642            // not a ddenseM*:  is.matrix() or vector:
643            b_is_vector = !isMatrix(b);
644        }
645
646        if(b_is_vector) {
647            /* determine *if* we want/need to transpose at all:
648             * if (length(b) == ncol(A)) have match: use dim = c(n, 1) (<=> do *not* transp);
649             *  otherwise, try to transpose: ok  if (ncol(A) == 1) [see also above]:  */
650            maybe_transp_b = (LENGTH(b) != a_nc);
651            // Here, we transpose already in mMatrix_as_dge*()  ==> don't do it later:
652            transp_b = FALSE;
653        }
654        SEXP b_M = PROTECT(mMatrix_as_dgeMatrix2(b, maybe_transp_b));
655
656        CHM_DN chb = AS_CHM_DN(b_M), b_t;
657      R_CheckStack();      R_CheckStack();
658        int ncol_b;
659        if(transp_b) { // transpose b:
660            b_t = cholmod_allocate_dense(chb->ncol, chb->nrow, chb->ncol, chb->xtype, &c);
661            chm_transpose_dense(b_t, chb);
662            ncol_b = b_t->ncol;
663        } else
664            ncol_b = chb->ncol;
665        // Result C {with dim() before it may be transposed}:
666        CHM_DN chc = cholmod_allocate_dense(a_nr, ncol_b, a_nr, chb->xtype, &c);
667        double one[] = {1,0}, zero[] = {0,0};
668        int nprot = 2;
669
670      cholmod_sdmult(cha, 0, one, zero, chb, chc, &c);      /* Tim Davis, please FIXME:  currently (2010-11) *fails* when  a  is a pattern matrix:*/
671      SET_VECTOR_ELT(dn, 0,       /* establish dimnames */      if(cha->xtype == CHOLMOD_PATTERN) {
672                     duplicate(VECTOR_ELT(GET_SLOT(a, Matrix_DimNamesSym), 0)));          /* warning(_("Csparse_dense_prod(): cholmod_sdmult() not yet implemented for pattern./ ngCMatrix" */
673      SET_VECTOR_ELT(dn, 1,          /*        " --> slightly inefficient coercion")); */
674                     duplicate(VECTOR_ELT(GET_SLOT(b_M, Matrix_DimNamesSym), 1)));
675      UNPROTECT(2);          // This *fails* to produce a CHOLMOD_REAL ..
676      return chm_dense_to_SEXP(chc, 1, 0, dn);          // CHM_SP chd = cholmod_l_copy(cha, cha->stype, CHOLMOD_REAL, &c);
677            // --> use our Matrix-classes
678            SEXP da = PROTECT(nz2Csparse(a, x_double)); nprot++;
679            cha = AS_CHM_SP(da);
680        }
681
682        /* cholmod_sdmult(A, transp, alpha, beta, X,  Y,  &c): depending on transp == 0 / != 0:
683         *  Y := alpha*(A*X) + beta*Y or alpha*(A'*X) + beta*Y;  here, alpha = 1, beta = 0:
684         *  Y := A*X  or  A'*X
685         *                       NB: always  <sparse> %*% <dense> !
686         */
687        cholmod_sdmult(cha, transp_a, one, zero, (transp_b ? b_t : chb), /* -> */ chc, &c);
688
689        SEXP dn = PROTECT(allocVector(VECSXP, 2));  /* establish dimnames */
690        SET_VECTOR_ELT(dn, transp_ans ? 1 : 0,
691                       duplicate(VECTOR_ELT(GET_SLOT(a, Matrix_DimNamesSym), transp_a ? 1 : 0)));
692        SET_VECTOR_ELT(dn, transp_ans ? 0 : 1,
693                       duplicate(VECTOR_ELT(GET_SLOT(b_M, Matrix_DimNamesSym),
694                                            transp_b ? 0 : 1)));
695        if(transp_b) cholmod_free_dense(&b_t, &c);
696        UNPROTECT(nprot);
697        return chm_dense_to_SEXP(chc, 1, 0, dn, transp_ans);
698  }  }
699
700  SEXP Csparse_dense_crossprod(SEXP a, SEXP b)
701    SEXP Csparse_dense_prod(SEXP a, SEXP b, SEXP transp)
702  {  {
703      CHM_SP cha = AS_CHM_SP(a);      return
704      SEXP b_M = PROTECT(mMatrix_as_dgeMatrix(b));          Csp_dense_products(a, b,
705      CHM_DN chb = AS_CHM_DN(b_M);                  /* transp_a = */ FALSE,
706      CHM_DN chc = cholmod_allocate_dense(cha->ncol, chb->ncol, cha->ncol,                  /* transp_b   = */ (*CHAR(asChar(transp)) == '2' || *CHAR(asChar(transp)) == 'B'),
707                                          chb->xtype, &c);                  /* transp_ans = */ (*CHAR(asChar(transp)) == 'c' || *CHAR(asChar(transp)) == 'B'));
708      SEXP dn = PROTECT(allocVector(VECSXP, 2));  }
double one[] = {1,0}, zero[] = {0,0};
R_CheckStack();
709
710      cholmod_sdmult(cha, 1, one, zero, chb, chc, &c);  SEXP Csparse_dense_crossprod(SEXP a, SEXP b, SEXP transp)
711      SET_VECTOR_ELT(dn, 0,       /* establish dimnames */  {
712                     duplicate(VECTOR_ELT(GET_SLOT(a, Matrix_DimNamesSym), 1)));      return
713      SET_VECTOR_ELT(dn, 1,          Csp_dense_products(a, b,
714                     duplicate(VECTOR_ELT(GET_SLOT(b_M, Matrix_DimNamesSym), 1)));                  /* transp_a = */ TRUE,
715      UNPROTECT(2);                  /* transp_b   = */ (*CHAR(asChar(transp)) == '2' || *CHAR(asChar(transp)) == 'B'),
716      return chm_dense_to_SEXP(chc, 1, 0, dn);                  /* transp_ans = */ (*CHAR(asChar(transp)) == 'c' || *CHAR(asChar(transp)) == 'B'));
717  }  }
718
719  /* Computes   x'x  or  x x' -- *also* for Tsparse (triplet = TRUE)
720     see Csparse_Csparse_crossprod above for  x'y and x y' */  /** @brief Computes   x'x  or  x x' -- *also* for Tsparse (triplet = TRUE)
721  SEXP Csparse_crossprod(SEXP x, SEXP trans, SEXP triplet)      see Csparse_Csparse_crossprod above for  x'y and x y'
722  {  */
723      int trip = asLogical(triplet),  SEXP Csparse_crossprod(SEXP x, SEXP trans, SEXP triplet, SEXP bool_arith)
724          tr   = asLogical(trans); /* gets reversed because _aat is tcrossprod */  {
725      CHM_TR cht = trip ? AS_CHM_TR(x) : (CHM_TR) NULL;      int tripl = asLogical(triplet),
726      CHM_SP chcp, chxt,          tr   = asLogical(trans), /* gets reversed because _aat is tcrossprod */
727          chx = (trip ?          do_bool = asLogical(bool_arith); // TRUE / NA / FALSE
728    #ifdef AS_CHM_DIAGU2N_FIXED_FINALLY
729        CHM_TR cht = tripl ? AS_CHM_TR(x) : (CHM_TR) NULL;  int nprot = 1;
730    #else /* workaround needed:*/
731        SEXP xx = PROTECT(Tsparse_diagU2N(x));
732        CHM_TR cht = tripl ? AS_CHM_TR__(xx) : (CHM_TR) NULL; int nprot = 2;
733    #endif
734        CHM_SP chcp, chxt, chxc,
735            chx = (tripl ?
736                 cholmod_triplet_to_sparse(cht, cht->nnz, &c) :                 cholmod_triplet_to_sparse(cht, cht->nnz, &c) :
737                 AS_CHM_SP(x));                 AS_CHM_SP(x));
738      SEXP dn = PROTECT(allocVector(VECSXP, 2));      SEXP dn = PROTECT(allocVector(VECSXP, 2));
739      R_CheckStack();      R_CheckStack();
740        Rboolean
741            x_is_n = (chx->xtype == CHOLMOD_PATTERN),
742            x_is_sym = chx->stype != 0,
743            force_num = (do_bool == FALSE);
744
745        if(x_is_n && force_num) {
746            // coerce 'x' to  double
747            SEXP dx = PROTECT(nz2Csparse(x, x_double)); nprot++;
748            chx = AS_CHM_SP(dx);
749            R_CheckStack();
750        }
751        else if(do_bool == TRUE && !x_is_n) { // Want boolean arithmetic; need patter[n]
752            // coerce 'x' to pattern
753            static const char *valid_tri[] = { MATRIX_VALID_tri_Csparse, "" };
754            SEXP dx = PROTECT(Csparse2nz(x, /* tri = */
755                                         R_check_class_etc(x, valid_tri) >= 0)); nprot++;
756            chx = AS_CHM_SP(dx);
757            R_CheckStack();
758        }
759
760      if (!tr) chxt = cholmod_transpose(chx, chx->xtype, &c);      if (!tr) chxt = cholmod_transpose(chx, chx->xtype, &c);
761      chcp = cholmod_aat((!tr) ? chxt : chx, (int *) NULL, 0, chx->xtype, &c);
762        if (x_is_sym) // cholmod_aat() does not like symmetric
763            chxc = cholmod_copy(tr ? chx : chxt, /* stype: */ 0,
764                                chx->xtype, &c);
765        // CHOLMOD/Core/cholmod_aat.c :
766        chcp = cholmod_aat(x_is_sym ? chxc : (tr ? chx : chxt),
767                           (int *) NULL, 0, /* mode: */ chx->xtype, &c);
768      if(!chcp) {      if(!chcp) {
769          UNPROTECT(1);          UNPROTECT(1);
770          error(_("Csparse_crossprod(): error return from cholmod_aat()"));          error(_("Csparse_crossprod(): error return from cholmod_aat()"));
771      }      }
772      cholmod_band_inplace(0, chcp->ncol, chcp->xtype, chcp, &c);      cholmod_band_inplace(0, chcp->ncol, chcp->xtype, chcp, &c);
773      chcp->stype = 1;      chcp->stype = 1; // symmetric
774      if (trip) cholmod_free_sparse(&chx, &c);      if (tripl) cholmod_free_sparse(&chx, &c);
775      if (!tr) cholmod_free_sparse(&chxt, &c);      if (!tr) cholmod_free_sparse(&chxt, &c);
776      SET_VECTOR_ELT(dn, 0,       /* establish dimnames */      SET_VECTOR_ELT(dn, 0,       /* establish dimnames */
777                     duplicate(VECTOR_ELT(GET_SLOT(x, Matrix_DimNamesSym),                     duplicate(VECTOR_ELT(GET_SLOT(x, Matrix_DimNamesSym),
778                                          (tr) ? 0 : 1)));                                          (tr) ? 0 : 1)));
779      SET_VECTOR_ELT(dn, 1, duplicate(VECTOR_ELT(dn, 0)));      SET_VECTOR_ELT(dn, 1, duplicate(VECTOR_ELT(dn, 0)));
780      UNPROTECT(1);      UNPROTECT(nprot);
781        // FIXME: uploT for symmetric ?
782      return chm_sparse_to_SEXP(chcp, 1, 0, 0, "", dn);      return chm_sparse_to_SEXP(chcp, 1, 0, 0, "", dn);
783  }  }
784
785    /** @brief Csparse_drop(x, tol):  drop entries with absolute value < tol, i.e,
786     *  at least all "explicit" zeros. */
787  SEXP Csparse_drop(SEXP x, SEXP tol)  SEXP Csparse_drop(SEXP x, SEXP tol)
788  {  {
789      const char *cl = class_P(x);      const char *cl = class_P(x);
790      /* dtCMatrix, etc; [1] = the second character =?= 't' for triangular */      /* dtCMatrix, etc; [1] = the second character =?= 't' for triangular */
791      int tr = (cl[1] == 't');      int tr = (cl[1] == 't'); // FIXME - rather  R_check_class_etc(..)
792      CHM_SP chx = AS_CHM_SP__(x);      CHM_SP chx = AS_CHM_SP__(x);
793      CHM_SP ans = cholmod_copy(chx, chx->stype, chx->xtype, &c);      CHM_SP ans = cholmod_copy(chx, chx->stype, chx->xtype, &c);
794      double dtol = asReal(tol);      double dtol = asReal(tol);
# Line 396  Line 803
803                                GET_SLOT(x, Matrix_DimNamesSym));                                GET_SLOT(x, Matrix_DimNamesSym));
804  }  }
805
806    /** @brief Horizontal Concatenation -  cbind( <Csparse>,  <Csparse>)
807     */
808  SEXP Csparse_horzcat(SEXP x, SEXP y)  SEXP Csparse_horzcat(SEXP x, SEXP y)
809  {  {
810      CHM_SP chx = AS_CHM_SP__(x), chy = AS_CHM_SP__(y);  #define CSPARSE_CAT(_KIND_)                                             \
811      int Rkind = 0; /* only for "d" - FIXME */      CHM_SP chx = AS_CHM_SP__(x), chy = AS_CHM_SP__(y);                  \
812      R_CheckStack();      R_CheckStack();                                                     \
813        int Rk_x = (chx->xtype != CHOLMOD_PATTERN) ? Real_kind(x) : -3,     \
814            Rk_y = (chy->xtype != CHOLMOD_PATTERN) ? Real_kind(y) : -3, Rkind; \
815        if(Rk_x == -3 || Rk_y == -3) { /* at least one of them is patter"n" */ \
816            if(Rk_x == -3 && Rk_y == -3) { /* fine */                       \
817            } else { /* only one is a patter"n"                             \
818                      * "Bug" in cholmod_horzcat()/vertcat(): returns patter"n" matrix if one of them is */ \
819                Rboolean ok;                                                \
820                if(Rk_x == -3) {                                            \
821                    ok = chm_MOD_xtype(CHOLMOD_REAL, chx, &c); Rk_x = 0;    \
822                } else if(Rk_y == -3) {                                     \
823                    ok = chm_MOD_xtype(CHOLMOD_REAL, chy, &c); Rk_y = 0;    \
824                } else                                                      \
825                    error(_("Impossible Rk_x/Rk_y in Csparse_%s(), please report"), _KIND_); \
826                if(!ok)                                                     \
827                    error(_("chm_MOD_xtype() was not successful in Csparse_%s(), please report"), \
828                          _KIND_);                                          \
829            }                                                               \
830        }                                                                   \
831        Rkind = /* logical if both x and y are */ (Rk_x == 1 && Rk_y == 1) ? 1 : 0
832
833        CSPARSE_CAT("horzcat");
834        // TODO: currently drops dimnames - and we fix at R level;
835
/* FIXME: currently drops dimnames */
836      return chm_sparse_to_SEXP(cholmod_horzcat(chx, chy, 1, &c),      return chm_sparse_to_SEXP(cholmod_horzcat(chx, chy, 1, &c),
837                                1, 0, Rkind, "", R_NilValue);                                1, 0, Rkind, "", R_NilValue);
838  }  }
839
840    /** @brief Vertical Concatenation -  rbind( <Csparse>,  <Csparse>)
841     */
842  SEXP Csparse_vertcat(SEXP x, SEXP y)  SEXP Csparse_vertcat(SEXP x, SEXP y)
843  {  {
844      CHM_SP chx = AS_CHM_SP__(x), chy = AS_CHM_SP__(y);      CSPARSE_CAT("vertcat");
845      int Rkind = 0; /* only for "d" - FIXME */      // TODO: currently drops dimnames - and we fix at R level;
R_CheckStack();
846
/* FIXME: currently drops dimnames */
847      return chm_sparse_to_SEXP(cholmod_vertcat(chx, chy, 1, &c),      return chm_sparse_to_SEXP(cholmod_vertcat(chx, chy, 1, &c),
848                                1, 0, Rkind, "", R_NilValue);                                1, 0, Rkind, "", R_NilValue);
849  }  }
# Line 464  Line 894
894      }      }
895      else { /* triangular with diag='N'): now drop the diagonal */      else { /* triangular with diag='N'): now drop the diagonal */
896          /* duplicate, since chx will be modified: */          /* duplicate, since chx will be modified: */
897          CHM_SP chx = AS_CHM_SP__(duplicate(x));          SEXP xx = PROTECT(duplicate(x));
898            CHM_SP chx = AS_CHM_SP__(xx);
899          int uploT = (*uplo_P(x) == 'U') ? 1 : -1,          int uploT = (*uplo_P(x) == 'U') ? 1 : -1,
900              Rkind = (chx->xtype != CHOLMOD_PATTERN) ? Real_kind(x) : 0;              Rkind = (chx->xtype != CHOLMOD_PATTERN) ? Real_kind(x) : 0;
901          R_CheckStack();          R_CheckStack();
902
903          chm_diagN2U(chx, uploT, /* do_realloc */ FALSE);          chm_diagN2U(chx, uploT, /* do_realloc */ FALSE);
904
905          return chm_sparse_to_SEXP(chx, /*dofree*/ 0/* or 1 ?? */,          SEXP ans = chm_sparse_to_SEXP(chx, /*dofree*/ 0/* or 1 ?? */,
906                                    uploT, Rkind, "U",                                    uploT, Rkind, "U",
907                                    GET_SLOT(x, Matrix_DimNamesSym));                                    GET_SLOT(x, Matrix_DimNamesSym));
908            UNPROTECT(1);// only now !
909            return ans;
910      }      }
911  }  }
912
913    /**
914     * Indexing aka subsetting : Compute  x[i,j], also for vectors i and j
915     * Working via CHOLMOD_submatrix, see ./CHOLMOD/MatrixOps/cholmod_submatrix.c
916     * @param x CsparseMatrix
917     * @param i row     indices (0-origin), or NULL (R, not C)
918     * @param j columns indices (0-origin), or NULL
919     *
920     * @return x[i,j]  still CsparseMatrix --- currently, this loses dimnames
921     */
922  SEXP Csparse_submatrix(SEXP x, SEXP i, SEXP j)  SEXP Csparse_submatrix(SEXP x, SEXP i, SEXP j)
923  {  {
924      CHM_SP chx = AS_CHM_SP__(x);      CHM_SP chx = AS_CHM_SP(x); /* << does diagU2N() when needed */
925      int rsize = (isNull(i)) ? -1 : LENGTH(i),      int rsize = (isNull(i)) ? -1 : LENGTH(i),
926          csize = (isNull(j)) ? -1 : LENGTH(j);          csize = (isNull(j)) ? -1 : LENGTH(j);
927      int Rkind = (chx->xtype != CHOLMOD_PATTERN) ? Real_kind(x) : 0;      int Rkind = (chx->xtype != CHOLMOD_PATTERN) ? Real_kind(x) : 0;
# Line 490  Line 932
932      if (csize >= 0 && !isInteger(j))      if (csize >= 0 && !isInteger(j))
933          error(_("Index j must be NULL or integer"));          error(_("Index j must be NULL or integer"));
934
935      return chm_sparse_to_SEXP(cholmod_submatrix(chx, INTEGER(i), rsize,  #define CHM_SUB(_M_, _i_, _j_)                                  \
936                                                  INTEGER(j), csize,      cholmod_submatrix(_M_,                                      \
937                                                  TRUE, TRUE, &c),                        (rsize < 0) ? NULL : INTEGER(_i_), rsize, \
938                                1, 0, Rkind, "",                        (csize < 0) ? NULL : INTEGER(_j_), csize, \
939                                /* FIXME: drops dimnames */ R_NilValue);                        TRUE, TRUE, &c)
940  }      CHM_SP ans;
941        if (!chx->stype) {/* non-symmetric Matrix */
942            ans = CHM_SUB(chx, i, j);
943        }
944        else {
945            /* for now, cholmod_submatrix() only accepts "generalMatrix" */
946            CHM_SP tmp = cholmod_copy(chx, /* stype: */ 0, chx->xtype, &c);
947            ans = CHM_SUB(tmp, i, j);
948            cholmod_free_sparse(&tmp, &c);
949        }
950
951        // "FIXME": currently dropping dimnames, and adding them afterwards in R :
952        /* // dimnames: */
953        /* SEXP x_dns = GET_SLOT(x, Matrix_DimNamesSym), */
954        /*  dn = PROTECT(allocVector(VECSXP, 2)); */
955        return chm_sparse_to_SEXP(ans, 1, 0, Rkind, "", /* dimnames: */ R_NilValue);
956    }
957
958    #define _d_Csp_
959    #include "t_Csparse_subassign.c"
960
961    #define _l_Csp_
962    #include "t_Csparse_subassign.c"
963
964    #define _i_Csp_
965    #include "t_Csparse_subassign.c"
966
967    #define _n_Csp_
968    #include "t_Csparse_subassign.c"
969
970    #define _z_Csp_
971    #include "t_Csparse_subassign.c"
972
973
974
975  SEXP Csparse_MatrixMarket(SEXP x, SEXP fname)  SEXP Csparse_MatrixMarket(SEXP x, SEXP fname)
976  {  {
# Line 524  Line 999
999   *   *
1000   * @return  a SEXP, either a (double) number or a length n-vector of diagonal entries   * @return  a SEXP, either a (double) number or a length n-vector of diagonal entries
1001   */   */
1002  SEXP diag_tC_ptr(int n, int *x_p, double *x_x, int *perm, SEXP resultKind)  SEXP diag_tC_ptr(int n, int *x_p, double *x_x, Rboolean is_U, int *perm,
1003  /*                                ^^^^^^ FIXME[Generalize] to int / ... */  /*                                ^^^^^^ FIXME[Generalize] to int / ... */
1004                     SEXP resultKind)
1005  {  {
1006      const char* res_ch = CHAR(STRING_ELT(resultKind,0));      const char* res_ch = CHAR(STRING_ELT(resultKind,0));
1007      enum diag_kind { diag, diag_backpermuted, trace, prod, sum_log      enum diag_kind { diag, diag_backpermuted, trace, prod, sum_log, min, max, range
1008      } res_kind = ((!strcmp(res_ch, "trace")) ? trace :      } res_kind = ((!strcmp(res_ch, "trace")) ? trace :
1009                    ((!strcmp(res_ch, "sumLog")) ? sum_log :                    ((!strcmp(res_ch, "sumLog")) ? sum_log :
1010                     ((!strcmp(res_ch, "prod")) ? prod :                     ((!strcmp(res_ch, "prod")) ? prod :
1011                        ((!strcmp(res_ch, "min")) ? min :
1012                         ((!strcmp(res_ch, "max")) ? max :
1013                          ((!strcmp(res_ch, "range")) ? range :
1014                      ((!strcmp(res_ch, "diag")) ? diag :                      ((!strcmp(res_ch, "diag")) ? diag :
1015                       ((!strcmp(res_ch, "diagBack")) ? diag_backpermuted :                       ((!strcmp(res_ch, "diagBack")) ? diag_backpermuted :
1016                        -1)))));                           -1))))))));
1017      int i, n_x, i_from = 0;      int i, n_x, i_from;
1018      SEXP ans = PROTECT(allocVector(REALSXP,      SEXP ans = PROTECT(allocVector(REALSXP,
1019  /*                                 ^^^^  FIXME[Generalize] */  /*                                 ^^^^  FIXME[Generalize] */
1020                                     (res_kind == diag ||                                     (res_kind == diag ||
1021                                      res_kind == diag_backpermuted) ? n : 1));                                      res_kind == diag_backpermuted) ? n :
1022                                       (res_kind == range ? 2 : 1)));
1023      double *v = REAL(ans);      double *v = REAL(ans);
1024  /*  ^^^^^^      ^^^^  FIXME[Generalize] */  /*  ^^^^^^      ^^^^  FIXME[Generalize] */
1025
1026        i_from = (is_U ? -1 : 0);
1027
1028  #define for_DIAG(v_ASSIGN)                                              \  #define for_DIAG(v_ASSIGN)                                              \
1029      for(i = 0; i < n; i++, i_from += n_x) {                             \      for(i = 0; i < n; i++) {                                    \
1030          /* looking at i-th column */                                    \          /* looking at i-th column */                                    \
1031          n_x = x_p[i+1] - x_p[i];/* #{entries} in this column */ \          n_x = x_p[i+1] - x_p[i];/* #{entries} in this column */ \
1032            if( is_U) i_from += n_x;                                \
1033          v_ASSIGN;                                                       \          v_ASSIGN;                                                       \
1034            if(!is_U) i_from += n_x;                                \
1035      }      }
1036
1037      /* NOTA BENE: we assume  -- uplo = "L" i.e. lower triangular matrix      /* NOTA BENE: we assume  -- uplo = "L" i.e. lower triangular matrix
1038       *            for uplo = "U" (makes sense with a "dtCMatrix" !),       *            for uplo = "U" (makes sense with a "dtCMatrix" !),
1039       *            should use  x_x[i_from + (nx - 1)] instead of x_x[i_from],       *            should use  x_x[i_from + (n_x - 1)] instead of x_x[i_from],
1040       *            where nx = (x_p[i+1] - x_p[i])       *            where n_x = (x_p[i+1] - x_p[i])
1041       */       */
1042
1043      switch(res_kind) {      switch(res_kind) {
1044      case trace:      case trace: // = sum
1045          v[0] = 0.;          v[0] = 0.;
1046          for_DIAG(v[0] += x_x[i_from]);          for_DIAG(v[0] += x_x[i_from]);
1047          break;          break;
# Line 572  Line 1056
1056          for_DIAG(v[0] *= x_x[i_from]);          for_DIAG(v[0] *= x_x[i_from]);
1057          break;          break;
1058
1059        case min:
1060            v[0] = R_PosInf;
1061            for_DIAG(if(v[0] > x_x[i_from]) v[0] = x_x[i_from]);
1062            break;
1063
1064        case max:
1065            v[0] = R_NegInf;
1066            for_DIAG(if(v[0] < x_x[i_from]) v[0] = x_x[i_from]);
1067            break;
1068
1069        case range:
1070            v[0] = R_PosInf;
1071            v[1] = R_NegInf;
1072            for_DIAG(if(v[0] > x_x[i_from]) v[0] = x_x[i_from];
1073                     if(v[1] < x_x[i_from]) v[1] = x_x[i_from]);
1074            break;
1075
1076      case diag:      case diag:
1077          for_DIAG(v[i] = x_x[i_from]);          for_DIAG(v[i] = x_x[i_from]);
1078          break;          break;
# Line 579  Line 1080
1080      case diag_backpermuted:      case diag_backpermuted:
1081          for_DIAG(v[i] = x_x[i_from]);          for_DIAG(v[i] = x_x[i_from]);
1082
1083          warning(_("resultKind = 'diagBack' (back-permuted) is experimental"));          warning(_("%s = '%s' (back-permuted) is experimental"),
1084                    "resultKind", "diagBack");
1085          /* now back_permute : */          /* now back_permute : */
1086          for(i = 0; i < n; i++) {          for(i = 0; i < n; i++) {
1087              double tmp = v[i]; v[i] = v[perm[i]]; v[perm[i]] = tmp;              double tmp = v[i]; v[i] = v[perm[i]]; v[perm[i]] = tmp;
# Line 588  Line 1090
1090          break;          break;
1091
1092      default: /* -1 from above */      default: /* -1 from above */
1093          error("diag_tC(): invalid 'resultKind'");          error(_("diag_tC(): invalid 'resultKind'"));
1094          /* Wall: */ ans = R_NilValue; v = REAL(ans);          /* Wall: */ ans = R_NilValue; v = REAL(ans);
1095      }      }
1096
# Line 600  Line 1102
1102   * Extract the diagonal entries from *triangular* Csparse matrix  __or__ a   * Extract the diagonal entries from *triangular* Csparse matrix  __or__ a
1103   * cholmod_sparse factor (LDL = TRUE).   * cholmod_sparse factor (LDL = TRUE).
1104   *   *
1105     * @param obj -- now a cholmod_sparse factor or a dtCMatrix
1106   * @param pslot  'p' (column pointer)   slot of Csparse matrix/factor   * @param pslot  'p' (column pointer)   slot of Csparse matrix/factor
1107   * @param xslot  'x' (non-zero entries) slot of Csparse matrix/factor   * @param xslot  'x' (non-zero entries) slot of Csparse matrix/factor
1108   * @param perm_slot  'perm' (= permutation vector) slot of corresponding CHMfactor;   * @param perm_slot  'perm' (= permutation vector) slot of corresponding CHMfactor;
# Line 608  Line 1111
1111   *   *
1112   * @return  a SEXP, either a (double) number or a length n-vector of diagonal entries   * @return  a SEXP, either a (double) number or a length n-vector of diagonal entries
1113   */   */
1114  SEXP diag_tC(SEXP pslot, SEXP xslot, SEXP perm_slot, SEXP resultKind)  SEXP diag_tC(SEXP obj, SEXP resultKind)
1115  {  {
1116
1117        SEXP
1118            pslot = GET_SLOT(obj, Matrix_pSym),
1119            xslot = GET_SLOT(obj, Matrix_xSym);
1120        Rboolean is_U = (R_has_slot(obj, Matrix_uploSym) &&
1121                         *CHAR(asChar(GET_SLOT(obj, Matrix_uploSym))) == 'U');
1122      int n = length(pslot) - 1, /* n = ncol(.) = nrow(.) */      int n = length(pslot) - 1, /* n = ncol(.) = nrow(.) */
1123          *x_p  = INTEGER(pslot),          *x_p  = INTEGER(pslot), pp = -1, *perm;
*perm = INTEGER(perm_slot);
1124      double *x_x = REAL(xslot);      double *x_x = REAL(xslot);
1125  /*  ^^^^^^        ^^^^ FIXME[Generalize] to INTEGER(.) / LOGICAL(.) / ... xslot !*/  /*  ^^^^^^        ^^^^ FIXME[Generalize] to INTEGER(.) / LOGICAL(.) / ... xslot !*/
1126
1127      return diag_tC_ptr(n, x_p, x_x, perm, resultKind);      if(R_has_slot(obj, Matrix_permSym))
1128            perm = INTEGER(GET_SLOT(obj, Matrix_permSym));
1129        else perm = &pp;
1130
1131        return diag_tC_ptr(n, x_p, x_x, is_U, perm, resultKind);
1132    }
1133
1134
1135    /**
1136     * Create a Csparse matrix object from indices and/or pointers.
1137     *
1138     * @param cls name of actual class of object to create
1139     * @param i optional integer vector of length nnz of row indices
1140     * @param j optional integer vector of length nnz of column indices
1141     * @param p optional integer vector of length np of row or column pointers
1142     * @param np length of integer vector p.  Must be zero if p == (int*)NULL
1143     * @param x optional vector of values
1144     * @param nnz length of vectors i, j and/or x, whichever is to be used
1145     * @param dims optional integer vector of length 2 to be used as
1146     *     dimensions.  If dims == (int*)NULL then the maximum row and column
1147     *     index are used as the dimensions.
1148     * @param dimnames optional list of length 2 to be used as dimnames
1149     * @param index1 indicator of 1-based indices
1150     *
1151     * @return an SEXP of class cls inheriting from CsparseMatrix.
1152     */
1153    SEXP create_Csparse(char* cls, int* i, int* j, int* p, int np,
1154                        void* x, int nnz, int* dims, SEXP dimnames,
1155                        int index1)
1156    {
1157        SEXP ans;
1158        int *ij = (int*)NULL, *tri, *trj,
1159            mi, mj, mp, nrow = -1, ncol = -1;
1160        int xtype = -1;             /* -Wall */
1161        CHM_TR T;
1162        CHM_SP A;
1163
1164        if (np < 0 || nnz < 0)
1165            error(_("negative vector lengths not allowed: np = %d, nnz = %d"),
1166                  np, nnz);
1167        if (1 != ((mi = (i == (int*)NULL)) +
1168                  (mj = (j == (int*)NULL)) +
1169                  (mp = (p == (int*)NULL))))
1170            error(_("exactly 1 of 'i', 'j' or 'p' must be NULL"));
1171        if (mp) {
1172            if (np) error(_("np = %d, must be zero when p is NULL"), np);
1173        } else {
1174            if (np) {               /* Expand p to form i or j */
1175                if (!(p[0])) error(_("p[0] = %d, should be zero"), p[0]);
1176                for (int ii = 0; ii < np; ii++)
1177                    if (p[ii] > p[ii + 1])
1178                        error(_("p must be non-decreasing"));
1179                if (p[np] != nnz)
1180                    error("p[np] = %d != nnz = %d", p[np], nnz);
1181                ij = Calloc(nnz, int);
1182                if (mi) {
1183                    i = ij;
1184                    nrow = np;
1185                } else {
1186                    j = ij;
1187                    ncol = np;
1188                }
1189                /* Expand p to 0-based indices */
1190                for (int ii = 0; ii < np; ii++)
1191                    for (int jj = p[ii]; jj < p[ii + 1]; jj++) ij[jj] = ii;
1192            } else {
1193                if (nnz)
1194                    error(_("Inconsistent dimensions: np = 0 and nnz = %d"),
1195                          nnz);
1196            }
1197        }
1198        /* calculate nrow and ncol */
1199        if (nrow < 0) {
1200            for (int ii = 0; ii < nnz; ii++) {
1201                int i1 = i[ii] + (index1 ? 0 : 1); /* 1-based index */
1202                if (i1 < 1) error(_("invalid row index at position %d"), ii);
1203                if (i1 > nrow) nrow = i1;
1204            }
1205        }
1206        if (ncol < 0) {
1207            for (int jj = 0; jj < nnz; jj++) {
1208                int j1 = j[jj] + (index1 ? 0 : 1);
1209                if (j1 < 1) error(_("invalid column index at position %d"), jj);
1210                if (j1 > ncol) ncol = j1;
1211            }
1212        }
1213        if (dims != (int*)NULL) {
1214            if (dims[0] > nrow) nrow = dims[0];
1215            if (dims[1] > ncol) ncol = dims[1];
1216        }
1217        /* check the class name */
1218        if (strlen(cls) != 8)
1219            error(_("strlen of cls argument = %d, should be 8"), strlen(cls));
1220        if (!strcmp(cls + 2, "CMatrix"))
1221            error(_("cls = \"%s\" does not end in \"CMatrix\""), cls);
1222        switch(cls[0]) {
1223        case 'd':
1224        case 'l':
1225            xtype = CHOLMOD_REAL;
1226        break;
1227        case 'n':
1228            xtype = CHOLMOD_PATTERN;
1229            break;
1230        default:
1231            error(_("cls = \"%s\" must begin with 'd', 'l' or 'n'"), cls);
1232        }
1233        if (cls[1] != 'g')
1234            error(_("Only 'g'eneral sparse matrix types allowed"));
1235        /* allocate and populate the triplet */
1236        T = cholmod_allocate_triplet((size_t)nrow, (size_t)ncol, (size_t)nnz, 0,
1237                                     xtype, &c);
1238        T->x = x;
1239        tri = (int*)T->i;
1240        trj = (int*)T->j;
1241        for (int ii = 0; ii < nnz; ii++) {
1242            tri[ii] = i[ii] - ((!mi && index1) ? 1 : 0);
1243            trj[ii] = j[ii] - ((!mj && index1) ? 1 : 0);
1244        }
1245        /* create the cholmod_sparse structure */
1246        A = cholmod_triplet_to_sparse(T, nnz, &c);
1247        cholmod_free_triplet(&T, &c);
1248        /* copy the information to the SEXP */
1249        ans = PROTECT(NEW_OBJECT(MAKE_CLASS(cls)));
1250    // FIXME: This has been copied from chm_sparse_to_SEXP in  chm_common.c
1251        /* allocate and copy common slots */
1252        nnz = cholmod_nnz(A, &c);
1253        dims = INTEGER(ALLOC_SLOT(ans, Matrix_DimSym, INTSXP, 2));
1254        dims[0] = A->nrow; dims[1] = A->ncol;
1255        Memcpy(INTEGER(ALLOC_SLOT(ans, Matrix_pSym, INTSXP, A->ncol + 1)), (int*)A->p, A->ncol + 1);
1256        Memcpy(INTEGER(ALLOC_SLOT(ans, Matrix_iSym, INTSXP, nnz)), (int*)A->i, nnz);
1257        switch(cls[1]) {
1258        case 'd':
1259            Memcpy(REAL(ALLOC_SLOT(ans, Matrix_xSym, REALSXP, nnz)), (double*)A->x, nnz);
1260            break;
1261        case 'l':
1262            error(_("code not yet written for cls = \"lgCMatrix\""));
1263        }
1264    /* FIXME: dimnames are *NOT* put there yet (if non-NULL) */
1265        cholmod_free_sparse(&A, &c);
1266        UNPROTECT(1);
1267        return ans;
1268  }  }

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