dtpMatrix.c
/* double (precision) Triangular Packed Matrices
* Note: this means *square* {n x n} matrices
*/
#include "dtpMatrix.h"
SEXP dtpMatrix_validate(SEXP obj)
{
SEXP val = triangularMatrix_validate(obj);
if(isString(val))
return(val);
else {
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);
}
}
static
double get_norm(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') {
work = (double *) R_alloc(dims[0], sizeof(double));
}
return F77_CALL(dlantp)(typnm, uplo_P(obj), diag_P(obj), dims,
REAL(GET_SLOT(obj, Matrix_xSym)), work);
}
SEXP dtpMatrix_norm(SEXP obj, SEXP type)
{
return ScalarReal(get_norm(obj, CHAR(asChar(type))));
}
SEXP dtpMatrix_rcond(SEXP obj, SEXP type)
{
int *dims = INTEGER(GET_SLOT(obj, Matrix_DimSym)), info;
char typnm[] = {'\0', '\0'};
double rcond;
typnm[0] = rcond_type(CHAR(asChar(type)));
F77_CALL(dtpcon)(typnm, uplo_P(obj), diag_P(obj), dims,
REAL(GET_SLOT(obj, Matrix_xSym)), &rcond,
(double *) R_alloc(3*dims[0], sizeof(double)),
(int *) R_alloc(dims[0], sizeof(int)), &info);
return ScalarReal(rcond);
}
SEXP dtpMatrix_solve(SEXP a)
{
SEXP val = PROTECT(duplicate(a));
int info, *Dim = INTEGER(GET_SLOT(val, Matrix_DimSym));
F77_CALL(dtptri)(uplo_P(val), diag_P(val), Dim,
REAL(GET_SLOT(val, Matrix_xSym)), &info);
UNPROTECT(1);
return val;
}
SEXP dtpMatrix_getDiag(SEXP x)
{
int n = *INTEGER(GET_SLOT(x, Matrix_DimSym));
SEXP val = PROTECT(allocVector(REALSXP, n));
if (*diag_P(x) == 'U') {
int j;
for (j = 0; j < n; j++) REAL(val)[j] = 1.;
} else {
packed_getDiag(REAL(val), x);
}
UNPROTECT(1);
return val;
}
SEXP dtpMatrix_matrix_solve(SEXP a, SEXP b)
{
SEXP val = PROTECT(duplicate(b));
int *Dim = INTEGER(GET_SLOT(a, Matrix_DimSym)),
*bDim = INTEGER(getAttrib(val, R_DimSymbol));
char *uplo = uplo_P(a), *diag = diag_P(a);
double *ax = REAL(GET_SLOT(a, Matrix_xSym));
int ione = 1, j;
if (bDim[0] != Dim[1])
error(_("Dimensions of a (%d,%d) and b (%d,%d) do not conform"),
Dim[0], Dim[1], bDim[0], bDim[1]);
for (j = 0; j < bDim[1]; j++)
F77_CALL(dtpsv)(uplo, "N", diag, bDim, ax,
REAL(val) + j * bDim[0], &ione);
UNPROTECT(1);
return val;
}
SEXP dtpMatrix_dgeMatrix_mm(SEXP x, SEXP y)
{
SEXP val = PROTECT(duplicate(y));
/* Since 'x' is square (n x n ), dim(x %*% y) = dim(y) */
int *xDim = INTEGER(GET_SLOT(x, Matrix_DimSym)),
*yDim = INTEGER(GET_SLOT(y, Matrix_DimSym));
int ione = 1, j;
char *uplo = uplo_P(x), *diag = diag_P(x);
double *xx = REAL(GET_SLOT(x, Matrix_xSym)),
*vx = REAL(GET_SLOT(val, Matrix_xSym));
if (yDim[0] != xDim[1])
error(_("Dimensions of a (%d,%d) and b (%d,%d) do not conform"),
xDim[0], xDim[1], yDim[0], yDim[1]);
for (j = 0; j < yDim[1]; j++) /* X %*% y[,j] via BLAS 2 DTPMV(.) */
F77_CALL(dtpmv)(uplo, "N", diag, yDim, xx,
vx + j * yDim[0], &ione);
UNPROTECT(1);
return val;
}
SEXP dgeMatrix_dtpMatrix_mm(SEXP x, SEXP y)
{
SEXP val = PROTECT(duplicate(x));
/* Since 'y' is square (n x n ), dim(x %*% y) = dim(x) */
int *xDim = INTEGER(GET_SLOT(x, Matrix_DimSym)),
*yDim = INTEGER(GET_SLOT(y, Matrix_DimSym));
int i;
char *uplo = uplo_P(y), *diag = diag_P(y);
double *yx = REAL(GET_SLOT(y, Matrix_xSym)),
*vx = REAL(GET_SLOT(val, Matrix_xSym));
if (yDim[0] != xDim[1])
error(_("Dimensions of a (%d,%d) and b (%d,%d) do not conform"),
xDim[0], xDim[1], yDim[0], yDim[1]);
for (i = 0; i < xDim[0]; i++)/* val[i,] := Y' %*% x[i,] */
F77_CALL(dtpmv)(uplo, "T", diag, yDim, yx,
vx + i, /* incr = */ xDim);
UNPROTECT(1);
return val;
}
SEXP dtpMatrix_matrix_mm(SEXP x, SEXP y)
{
SEXP val = PROTECT(duplicate(y));
/* Since 'x' is square (n x n ), dim(x %*% y) = dim(y) */
int *xDim = INTEGER(GET_SLOT(x, Matrix_DimSym)),
*yDim = INTEGER(getAttrib(y, R_DimSymbol));
int ione = 1, j;
char *uplo = uplo_P(x), *diag = diag_P(x);
double *xx = REAL(GET_SLOT(x, Matrix_xSym));
if (yDim[0] != xDim[1])
error(_("Dimensions of a (%d,%d) and b (%d,%d) do not conform"),
xDim[0], xDim[1], yDim[0], yDim[1]);
for (j = 0; j < yDim[1]; j++)
F77_CALL(dtpmv)(uplo, "N", diag, yDim, xx,
REAL(val) + j * yDim[0], &ione);
UNPROTECT(1);
return val;
}
SEXP dtpMatrix_as_dtrMatrix(SEXP from)
{
SEXP val = PROTECT(NEW_OBJECT(MAKE_CLASS("dtrMatrix"))),
uplo = GET_SLOT(from, Matrix_uploSym),
diag = GET_SLOT(from, Matrix_diagSym),
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_diagSym, duplicate(diag));
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;
}