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

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revision 1867, Mon Jun 4 17:13:02 2007 UTC revision 1893, Thu Jun 14 10:46:10 2007 UTC
# Line 7  Line 7 
7      /* NB: we do *NOT* check a potential 'x' slot here, at all */      /* NB: we do *NOT* check a potential 'x' slot here, at all */
8      SEXP pslot = GET_SLOT(x, Matrix_pSym),      SEXP pslot = GET_SLOT(x, Matrix_pSym),
9          islot = GET_SLOT(x, Matrix_iSym);          islot = GET_SLOT(x, Matrix_iSym);
10      int j, k, sorted,      Rboolean sorted, strictly;
11        int j, k,
12          *dims = INTEGER(GET_SLOT(x, Matrix_DimSym)),          *dims = INTEGER(GET_SLOT(x, Matrix_DimSym)),
13          nrow = dims[0],          nrow = dims[0],
14          ncol = dims[1],          ncol = dims[1],
# Line 18  Line 19 
19          return mkString(_("slot p must have length = ncol(.) + 1"));          return mkString(_("slot p must have length = ncol(.) + 1"));
20      if (xp[0] != 0)      if (xp[0] != 0)
21          return mkString(_("first element of slot p must be zero"));          return mkString(_("first element of slot p must be zero"));
22      if (length(islot) != xp[ncol])      if (length(islot) < xp[ncol]) /* allow larger slots from over-allocation!*/
23          return          return
24              mkString(_("last element of slot p must match length of slots i and x"));              mkString(_("last element of slot p must match length of slots i and x"));
25      for (j = 0; j < length(islot); j++) {      for (j = 0; j < length(islot); j++) {
26          if (xi[j] < 0 || xi[j] >= nrow)          if (xi[j] < 0 || xi[j] >= nrow)
27              return mkString(_("all row indices must be between 0 and nrow-1"));              return mkString(_("all row indices must be between 0 and nrow-1"));
28      }      }
29      sorted = TRUE;      sorted = TRUE; strictly = TRUE;
30      for (j = 0; j < ncol; j++) {      for (j = 0; j < ncol; j++) {
31          if (xp[j] > xp[j+1])          if (xp[j] > xp[j+1])
32              return mkString(_("slot p must be non-decreasing"));              return mkString(_("slot p must be non-decreasing"));
33          for (k = xp[j] + 1; k < xp[j + 1]; k++)          if(sorted)
34              if (xi[k] < xi[k - 1]) sorted = FALSE;              for (k = xp[j] + 1; k < xp[j + 1]; k++) {
35                    if (xi[k] < xi[k - 1])
36                        sorted = FALSE;
37                    else if (xi[k] == xi[k - 1])
38                        strictly = FALSE;
39                }
40      }      }
41      if (!sorted) {      if (!sorted) {
42          cholmod_sparse *chx = as_cholmod_sparse(x);          cholmod_sparse *chx = as_cholmod_sparse(x);
43          cholmod_sort(chx, &c);          cholmod_sort(chx, &c);
44          Free(chx);          Free(chx);
45            /* Now re-check that row indices are *strictly* increasing
46             * (and not just increasing) within each column : */
47            for (j = 0; j < ncol; j++) {
48                for (k = xp[j] + 1; k < xp[j + 1]; k++)
49                    if (xi[k] == xi[k - 1])
50                        return mkString(_("slot i is not *strictly* increasing inside a column (even after cholmod_sort)"));
51            }
52    
53        } else if(!strictly) {  /* sorted, but not strictly */
54            return mkString(_("slot i is not *strictly* increasing inside a column"));
55      }      }
56      return ScalarLogical(1);      return ScalarLogical(1);
57  }  }

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