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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 922, Sun Sep 18 16:33:54 2005 UTC revision 957, Sat Oct 1 20:08:04 2005 UTC
# Line 85  Line 85 
85    
86      cholmod_sdmult(cha, 0, &alpha, &beta, chb, chc, &c);      cholmod_sdmult(cha, 0, &alpha, &beta, chb, chc, &c);
87      Free(cha); Free(chb);      Free(cha); Free(chb);
88      return chm_sparse_to_SEXP(chc, 1);      return chm_dense_to_SEXP(chc, 1);
89  #else  #else
90      error("General multiplication requires CHOLMOD");      error("General multiplication requires CHOLMOD");
91      return R_NilValue;          /* -Wall */      return R_NilValue;          /* -Wall */
92  #endif  /* USE_CHOLMOD */  #endif  /* USE_CHOLMOD */
93  }  }
94    
95  SEXP Csparse_tcrossprod(SEXP x)  SEXP Csparse_crossprod(SEXP x, SEXP trans, SEXP triplet)
96  {  {
97  #ifdef USE_CHOLMOD  #ifdef USE_CHOLMOD
98      cholmod_sparse *chx = as_cholmod_sparse(x);      int trip = asLogical(triplet),
99      cholmod_sparse *chxt = cholmod_aat(chx, (int *) NULL, 0, chx->xtype, &c);          tr   = asLogical(trans); /* gets reversed because _aat is tcrossprod */
100        cholmod_triplet
101            *cht = trip ? as_cholmod_triplet(x) : (cholmod_triplet*) NULL;
102        cholmod_sparse *chcp, *chxt,
103            *chx = trip ? cholmod_triplet_to_sparse(cht, cht->nnz, &c)
104            : as_cholmod_sparse(x);
105    
106        if (!tr)
107            chxt = cholmod_transpose(chx, (int) chx->xtype, &c);
108        chcp = cholmod_aat((!tr) ? chxt : chx, (int *) NULL, 0, chx->xtype, &c);
109        if(!chcp)
110            error("Csparse_crossprod(): error return from cholmod_aat()");
111    
112        if (trip) {
113            cholmod_free_sparse(&chx, &c);
114            Free(cht);
115        } else {
116      Free(chx);      Free(chx);
117      return chm_sparse_to_SEXP(chxt, 1);      }
118        if (!tr) cholmod_free_sparse(&chxt, &c);
119        return chm_sparse_to_SEXP(chcp, 1);
120  #else  #else
121      error("General transpose requires CHOLMOD");      error("General crossproduct requires CHOLMOD");
122      return R_NilValue;          /* -Wall */      return R_NilValue;          /* -Wall */
123  #endif  /* USE_CHOLMOD */  #endif  /* USE_CHOLMOD */
124  }  }
125    

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