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/* cs_multiply: sparse matrix multiply */
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const mxArray *pargin [ ]
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if (nargout > 1 || nargin != 2)
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mexErrMsgTxt ("Usage: C = cs_multiply(A,B)") ;
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if (mxIsComplex (pargin [0]) || mxIsComplex (pargin [1]))
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cs_cl Amatrix, Bmatrix, A1matrix, B1matrix, *A, *B, *C, *D, *A1, *B1 ;
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A1 = cs_cl_mex_get_sparse (&A1matrix, 0, pargin [0]) ;
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A = cs_cl_transpose (A1, 1) ;
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cs_cl_free (A1->x) ; /* complex copy no longer needed */
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B1 = cs_cl_mex_get_sparse (&B1matrix, 0, pargin [1]) ;
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B = cs_cl_transpose (B1, 1) ;
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cs_cl_free (B1->x) ; /* complex copy no longer needed */
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D = cs_cl_multiply (B,A) ; /* D = B'*A' */
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cs_cl_dropzeros (D) ; /* drop zeros from D */
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C = cs_cl_transpose (D, 1) ; /* C = D', so C is sorted */
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pargout [0] = cs_cl_mex_put_sparse (&C) ; /* return C */
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mexErrMsgTxt ("complex matrices not supported") ;
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cs_dl Amatrix, Bmatrix, *A, *B, *C, *D ;
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A = cs_dl_transpose (cs_dl_mex_get_sparse (&Amatrix, 0,1, pargin[0]),1);
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B = cs_dl_transpose (cs_dl_mex_get_sparse (&Bmatrix, 0,1, pargin[1]),1);
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D = cs_dl_multiply (B,A) ; /* D = B'*A' */
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cs_dl_dropzeros (D) ; /* drop zeros from D */
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C = cs_dl_transpose (D, 1) ; /* C = D', so C is sorted */
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pargout [0] = cs_dl_mex_put_sparse (&C) ; /* return C */