https://github.com/cran/Matrix
Tip revision: c02ab7a239d2c013a97a41dd1b1c2e5997969466 authored by Douglas Bates on 19 September 2006, 00:00:00 UTC
version 0.995-20
version 0.995-20
Tip revision: c02ab7a
dspMatrix.c
#include "dspMatrix.h"
/* Note: also used for lspMatrix */
SEXP dspMatrix_validate(SEXP obj)
{
SEXP val = symmetricMatrix_validate(obj);
if(isString(val))
return(val);
else { /* identical to the test in dtpMatrix_validate() : */
int *dims = INTEGER(GET_SLOT(obj, Matrix_DimSym));
if (dims[0] != packed_ncol(length(GET_SLOT(obj, Matrix_xSym))))
return(mkString(_("Incorrect length of 'x' slot")));
return ScalarLogical(1);
}
}
double get_norm_sp(SEXP obj, char *typstr)
{
char typnm[] = {'\0', '\0'};
int *dims = INTEGER(GET_SLOT(obj, Matrix_DimSym));
double *work = (double *) NULL;
typnm[0] = norm_type(typstr);
if (*typnm == 'I' || *typnm == 'O') {
work = (double *) R_alloc(dims[0], sizeof(double));
}
return F77_CALL(dlansp)(typnm, uplo_P(obj), dims,
REAL(GET_SLOT(obj, Matrix_xSym)), work);
}
SEXP dspMatrix_norm(SEXP obj, SEXP type)
{
return ScalarReal(get_norm_sp(obj, CHAR(asChar(type))));
}
SEXP dspMatrix_rcond(SEXP obj, SEXP type)
{
SEXP trf = dspMatrix_trf(obj);
char typnm[] = {'\0', '\0'};
int *dims = INTEGER(GET_SLOT(obj, Matrix_DimSym)), info;
double anorm = get_norm_sp(obj, "O"), rcond;
typnm[0] = rcond_type(CHAR(asChar(type)));
F77_CALL(dspcon)(uplo_P(trf), dims,
REAL (GET_SLOT(trf, Matrix_xSym)),
INTEGER(GET_SLOT(trf, Matrix_permSym)),
&anorm, &rcond,
(double *) R_alloc(2*dims[0], sizeof(double)),
(int *) R_alloc(dims[0], sizeof(int)), &info);
return ScalarReal(rcond);
}
SEXP dspMatrix_solve(SEXP a)
{
SEXP trf = dspMatrix_trf(a);
SEXP val = PROTECT(NEW_OBJECT(MAKE_CLASS("dspMatrix")));
int *dims = INTEGER(GET_SLOT(trf, Matrix_DimSym)), info;
SET_SLOT(val, Matrix_uploSym, duplicate(GET_SLOT(trf, Matrix_uploSym)));
SET_SLOT(val, Matrix_xSym, duplicate(GET_SLOT(trf, Matrix_xSym)));
SET_SLOT(val, Matrix_DimSym, duplicate(GET_SLOT(trf, Matrix_DimSym)));
F77_CALL(dsptri)(uplo_P(val), dims, REAL(GET_SLOT(val, Matrix_xSym)),
INTEGER(GET_SLOT(trf, Matrix_permSym)),
(double *) R_alloc((long) dims[0], sizeof(double)),
&info);
UNPROTECT(1);
return val;
}
SEXP dspMatrix_matrix_solve(SEXP a, SEXP b)
{
SEXP trf = dspMatrix_trf(a),
val = PROTECT(dup_mMatrix_as_dgeMatrix(b));
int *adims = INTEGER(GET_SLOT(a, Matrix_DimSym)),
*bdims = INTEGER(GET_SLOT(val, Matrix_DimSym));
int n = bdims[0], nrhs = bdims[1], info;
if (adims[0] != n || nrhs < 1 || n < 1)
error(_("Dimensions of system to be solved are inconsistent"));
F77_CALL(dsptrs)(uplo_P(trf),
&n, &nrhs, REAL(GET_SLOT(trf, Matrix_xSym)),
INTEGER(GET_SLOT(trf, Matrix_permSym)),
REAL(GET_SLOT(val, Matrix_xSym)), &n, &info);
UNPROTECT(1);
return val;
}
SEXP dspMatrix_as_dsyMatrix(SEXP from)
{
SEXP val = PROTECT(NEW_OBJECT(MAKE_CLASS("dsyMatrix"))),
uplo = GET_SLOT(from, Matrix_uploSym),
dimP = GET_SLOT(from, Matrix_DimSym),
dmnP = GET_SLOT(from, Matrix_DimNamesSym);
int n = *INTEGER(dimP);
SET_SLOT(val, Matrix_DimSym, duplicate(dimP));
SET_SLOT(val, Matrix_DimNamesSym, duplicate(dmnP));
SET_SLOT(val, Matrix_uploSym, duplicate(uplo));
packed_to_full_double(REAL(ALLOC_SLOT(val, Matrix_xSym, REALSXP, n*n)),
REAL(GET_SLOT(from, Matrix_xSym)), n,
*CHAR(STRING_ELT(uplo, 0)) == 'U' ? UPP : LOW);
UNPROTECT(1);
return val;
}
SEXP dspMatrix_matrix_mm(SEXP a, SEXP b)
{
SEXP val = PROTECT(dup_mMatrix_as_dgeMatrix(b));
int *bdims = INTEGER(GET_SLOT(val, Matrix_DimSym));
int i, ione = 1, n = bdims[0], nrhs = bdims[1];
char *uplo = uplo_P(a);
double *ax = REAL(GET_SLOT(a, Matrix_xSym)), one = 1., zero = 0.,
*vx = REAL(GET_SLOT(val, Matrix_xSym));
double *bx = Memcpy(Calloc(n * nrhs, double), vx, n * nrhs);
if (bdims[0] != n)
error(_("Matrices are not conformable for multiplication"));
if (nrhs < 1 || n < 1)
error(_("Matrices with zero extents cannot be multiplied"));
for (i = 0; i < nrhs; i++)
F77_CALL(dspmv)(uplo, &n, &one, ax, bx + i * n, &ione,
&zero, vx + i * n, &ione);
Free(bx);
UNPROTECT(1);
return val;
}
SEXP dspMatrix_trf(SEXP x)
{
SEXP val = get_factors(x, "pBunchKaufman"),
dimP = GET_SLOT(x, Matrix_DimSym),
uploP = GET_SLOT(x, Matrix_uploSym);
int *dims = INTEGER(dimP), *perm, info;
int n = dims[0];
char *uplo = CHAR(STRING_ELT(uploP, 0));
if (val != R_NilValue) return val;
dims = INTEGER(dimP);
val = PROTECT(NEW_OBJECT(MAKE_CLASS("pBunchKaufman")));
SET_SLOT(val, Matrix_uploSym, duplicate(uploP));
SET_SLOT(val, Matrix_diagSym, mkString("N"));
SET_SLOT(val, Matrix_DimSym, duplicate(dimP));
SET_SLOT(val, Matrix_xSym, duplicate(GET_SLOT(x, Matrix_xSym)));
perm = INTEGER(ALLOC_SLOT(val, Matrix_permSym, INTSXP, n));
F77_CALL(dsptrf)(uplo, dims, REAL(GET_SLOT(val, Matrix_xSym)), perm, &info);
if (info) error(_("Lapack routine %s returned error code %d"), "dsptrf", info);
UNPROTECT(1);
return set_factors(x, val, "pBunchKaufman");
}