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[matrix] Annotation of /branches/Matrix-mer2/src/ltCMatrix.c
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Annotation of /branches/Matrix-mer2/src/ltCMatrix.c

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Revision 736 - (view) (download) (as text)
Original Path: pkg/src/ltCMatrix.c

1 : bates 736 /* Sparse triangular logical matrices */
2 :     #include "ltCMatrix.h"
3 :    
4 :     /**
5 :     * Check the validity of the slots of an ltCMatrix object
6 :     *
7 :     * @param x Pointer to an ltCMatrix object
8 :     *
9 :     * @return an SEXP that is either TRUE or a character string
10 :     * describing the way in which the object failed the validity check
11 :     */
12 :     SEXP ltCMatrix_validate(SEXP x)
13 :     {
14 :     SEXP val = check_scalar_string(GET_SLOT(x, Matrix_uploSym),
15 :     "LU", "uplo");
16 :     int *Dim = INTEGER(GET_SLOT(x, Matrix_DimSym));
17 :    
18 :     if (isString(val)) return val;
19 :     if (isString(val = check_scalar_string(GET_SLOT(x, Matrix_diagSym),
20 :     "NU", "diag"))) return val;
21 :     if (Dim[0] != Dim[1])
22 :     return mkString(_("Symmetric matrix must be square"));
23 :     csc_check_column_sorting(x);
24 :     return ScalarLogical(1);
25 :     }
26 :    
27 :     /**
28 :     * Transpose an ltCMatrix
29 :     *
30 :     * @param x Pointer to an ltCMatrix object
31 :     *
32 :     * @return the transpose of x. It represents the same matrix but is
33 :     * stored in the opposite triangle.
34 :     */
35 :     SEXP ltCMatrix_trans(SEXP x)
36 :     {
37 :     SEXP Xi = GET_SLOT(x, Matrix_iSym),
38 :     ans = PROTECT(NEW_OBJECT(MAKE_CLASS("ltCMatrix"))),
39 :     xdn = GET_SLOT(x, Matrix_DimNamesSym);
40 :     SEXP adn = ALLOC_SLOT(ans, Matrix_DimNamesSym, VECSXP, 2);
41 :     int *adims = INTEGER(ALLOC_SLOT(ans, Matrix_DimSym, INTSXP, 2)),
42 :     *xdims = INTEGER(GET_SLOT(x, Matrix_DimSym)),
43 :     up = CHAR(asChar(GET_SLOT(x, Matrix_uploSym)))[0] == 'U';
44 :     int m = xdims[0], n = xdims[1], nz = length(Xi);
45 :     int *xj = expand_cmprPt(n, INTEGER(GET_SLOT(x, Matrix_pSym)),
46 :     Calloc(nz, int));
47 :    
48 :     adims[0] = n; adims[1] = m;
49 :     SET_VECTOR_ELT(adn, 0, VECTOR_ELT(xdn, 1));
50 :     SET_VECTOR_ELT(adn, 1, VECTOR_ELT(xdn, 0));
51 :     SET_SLOT(ans, Matrix_uploSym, mkString(up ? "L" : "U"));
52 :     SET_SLOT(ans, Matrix_diagSym, duplicate(GET_SLOT(x, Matrix_diagSym)));
53 :     triplet_to_col(n, m, nz, xj, INTEGER(Xi), (double *) NULL,
54 :     INTEGER(ALLOC_SLOT(ans, Matrix_pSym, INTSXP, m + 1)),
55 :     INTEGER(ALLOC_SLOT(ans, Matrix_iSym, INTSXP, nz)),
56 :     (double *) NULL);
57 :     Free(xj);
58 :     UNPROTECT(1);
59 :     return ans;
60 :     }
61 :    
62 :     /**
63 :     * Solve one of the matrix equations op(A)*C = B, or
64 :     * C*op(A) = B where A is a square ltCMatrix and B and C are lgCMatrix
65 :     * objects.
66 :     *
67 :     * @param side LFT or RGT
68 :     * @param transa TRN or NTR
69 :     * @param A pointer to an ltCMatrix object
70 :     * @param B pointer to an lgCMatrix object
71 :     * @param C pointer to an lgCMatrix object
72 :     */
73 :     void
74 :     ltClgCsm(enum CBLAS_SIDE side, enum CBLAS_TRANSPOSE transa,
75 :     SEXP A, SEXP B, SEXP C)
76 :     {
77 :     error(_("code not yet written"));
78 :     }

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