Revision 1e790220feb1cb3f461915da11954d8b7fcb4c6b authored by Martin Maechler on 23 December 2013, 00:00:00 UTC, committed by Gabor Csardi on 23 December 2013, 00:00:00 UTC
1 parent d1f70fa
dtrMatrix.c
/* double (precision) TRiangular Matrices */
#include "dtrMatrix.h"
SEXP triangularMatrix_validate(SEXP obj)
{
SEXP val = GET_SLOT(obj, Matrix_DimSym);
if (LENGTH(val) < 2)
return mkString(_("'Dim' slot has length less than two"));
if (INTEGER(val)[0] != INTEGER(val)[1])
return mkString(_("Matrix is not square"));
if (isString(val = check_scalar_string(GET_SLOT(obj, Matrix_uploSym),
"LU", "uplo"))) return val;
if (isString(val = check_scalar_string(GET_SLOT(obj, Matrix_diagSym),
"NU", "diag"))) return val;
return ScalarLogical(1);
}
SEXP dtrMatrix_validate(SEXP obj)
{
/* since "dtr" inherits from "triangular", and "dMatrix", only need this:*/
return dense_nonpacked_validate(obj);
}
static
double get_norm(SEXP obj, const char *typstr)
{
char typnm[] = {'\0', '\0'};
int *dims = INTEGER(GET_SLOT(obj, Matrix_DimSym));
double *work = (double *) NULL;
typnm[0] = La_norm_type(typstr);
if (*typnm == 'I') {
work = (double *) R_alloc(dims[0], sizeof(double));
}
return F77_CALL(dlantr)(typnm, uplo_P(obj), diag_P(obj), dims, dims+1,
REAL(GET_SLOT(obj, Matrix_xSym)), dims, work);
}
SEXP dtrMatrix_norm(SEXP obj, SEXP type)
{
return ScalarReal(get_norm(obj, CHAR(asChar(type))));
}
SEXP dtrMatrix_rcond(SEXP obj, SEXP type)
{
char typnm[] = {'\0', '\0'};
int *dims = INTEGER(GET_SLOT(obj, Matrix_DimSym)), info;
double rcond;
typnm[0] = La_rcond_type(CHAR(asChar(type)));
F77_CALL(dtrcon)(typnm, uplo_P(obj), diag_P(obj), dims,
REAL(GET_SLOT(obj, Matrix_xSym)), dims, &rcond,
(double *) R_alloc(3*dims[0], sizeof(double)),
(int *) R_alloc(dims[0], sizeof(int)), &info);
return ScalarReal(rcond);
}
SEXP dtrMatrix_solve(SEXP a)
{
SEXP val = PROTECT(duplicate(a));
int info, *Dim = INTEGER(GET_SLOT(val, Matrix_DimSym));
F77_CALL(dtrtri)(uplo_P(val), diag_P(val), Dim,
REAL(GET_SLOT(val, Matrix_xSym)), Dim, &info);
UNPROTECT(1);
return val;
}
SEXP dtrMatrix_chol2inv(SEXP a)
{
SEXP val = PROTECT(NEW_OBJECT(MAKE_CLASS("dpoMatrix")));
int info, n;
slot_dup(val, a, Matrix_DimSym);
slot_dup(val, a, Matrix_uploSym);
slot_dup(val, a, Matrix_diagSym);
slot_dup(val, a, Matrix_DimNamesSym);
slot_dup(val, a, Matrix_xSym);
n = *INTEGER(GET_SLOT(val, Matrix_DimSym));
F77_CALL(dpotri)(uplo_P(val), &n,
REAL(GET_SLOT(val, Matrix_xSym)), &n, &info);
UNPROTECT(1);
return val;
}
SEXP dtrMatrix_matrix_solve(SEXP a, SEXP b)
{
SEXP ans = PROTECT(dup_mMatrix_as_dgeMatrix(b));
int *adims = INTEGER(GET_SLOT(a, Matrix_DimSym)),
*bdims = INTEGER(GET_SLOT(ans, Matrix_DimSym));
int n = bdims[0], nrhs = bdims[1];
double one = 1.0;
if (*adims != *bdims || bdims[1] < 1 || *adims < 1 || *adims != adims[1])
error(_("Dimensions of system to be solved are inconsistent"));
F77_CALL(dtrsm)("L", uplo_P(a), "N", diag_P(a),
&n, &nrhs, &one, REAL(GET_SLOT(a, Matrix_xSym)), &n,
REAL(GET_SLOT(ans, Matrix_xSym)), &n);
UNPROTECT(1);
return ans;
}
/* to bu used for all three: '%*%', crossprod() and tcrossprod() */
SEXP dtrMatrix_matrix_mm(SEXP a, SEXP b, SEXP right, SEXP trans)
{
/* Because a must be square, the size of the answer, val,
* is the same as the size of b */
SEXP val = PROTECT(dup_mMatrix_as_dgeMatrix(b));
int rt = asLogical(right); /* if(rt), compute b %*% op(a), else op(a) %*% b */
int tr = asLogical(trans);/* if true, use t(a) */
int *adims = INTEGER(GET_SLOT(a, Matrix_DimSym)),
*bdims = INTEGER(GET_SLOT(val, Matrix_DimSym));
int m = bdims[0], n = bdims[1];
double one = 1.;
if (adims[0] != adims[1])
error(_("dtrMatrix must be square"));
if ((rt && adims[0] != n) || (!rt && adims[1] != m))
error(_("Matrices are not conformable for multiplication"));
if (m < 1 || n < 1) {
/* error(_("Matrices with zero extents cannot be multiplied")); */
} else /* BLAS */
F77_CALL(dtrmm)(rt ? "R" : "L", uplo_P(a),
/*trans_A = */ tr ? "T" : "N",
diag_P(a), &m, &n, &one,
REAL(GET_SLOT(a, Matrix_xSym)), adims,
REAL(GET_SLOT(val, Matrix_xSym)), &m);
UNPROTECT(1);
return val;
}
SEXP dtrMatrix_dtrMatrix_mm(SEXP a, SEXP b, SEXP right, SEXP trans)
{
/* to be called from "%*%" and crossprod(), tcrossprod(),
* from ../R/products.R
*
* TWO cases : (1) result is triangular <=> uplo are equal
* === (2) result is "general"
*/
SEXP val,/* = in case (2): PROTECT(dup_mMatrix_as_dgeMatrix(b)); */
d_a = GET_SLOT(a, Matrix_DimSym),
uplo_a = GET_SLOT(a, Matrix_uploSym),
diag_a = GET_SLOT(a, Matrix_diagSym);
/* if(rt), compute b %*% a, else a %*% b */
int rt = asLogical(right);
int tr = asLogical(trans);/* if true, use t(a) */
int *adims = INTEGER(d_a), n = adims[0];
double *valx = (double *) NULL /*Wall*/;
const char
*uplo_a_ch = CHAR(STRING_ELT(uplo_a, 0)), /* = uplo_P(a) */
*diag_a_ch = CHAR(STRING_ELT(diag_a, 0)); /* = diag_P(a) */
Rboolean same_uplo = (*uplo_a_ch == *uplo_P(b)),
uDiag_b = /* -Wall: */ FALSE;
if (INTEGER(GET_SLOT(b, Matrix_DimSym))[0] != n)
/* validity checking already "assures" square matrices ... */
error(_("dtrMatrices in %*% must have matching (square) dim."));
if(same_uplo) {
/* ==> result is triangular -- "dtrMatrix" !
* val := dup_mMatrix_as_dtrMatrix(b) : */
int sz = n * n;
val = PROTECT(NEW_OBJECT(MAKE_CLASS("dtrMatrix")));
SET_SLOT(val, Matrix_uploSym, duplicate(uplo_a));
SET_SLOT(val, Matrix_DimSym, duplicate(d_a));
SET_DimNames(val, b);
valx = REAL(ALLOC_SLOT(val, Matrix_xSym, REALSXP, sz));
Memcpy(valx, REAL(GET_SLOT(b, Matrix_xSym)), sz);
if((uDiag_b = *diag_P(b) == 'U')) {
/* unit-diagonal b - may contain garbage in diagonal */
for (int i = 0; i < n; i++)
valx[i * (n+1)] = 1.;
}
} else { /* different "uplo" ==> result is "dgeMatrix" ! */
val = PROTECT(dup_mMatrix_as_dgeMatrix(b));
}
if (n >= 1) {
double alpha = 1.;
/* Level 3 BLAS - DTRMM(): Compute one of the matrix multiplication operations
* B := alpha*op( A )*B ["L"], or B := alpha*B*op( A ) ["R"],
* where trans_A determines op(A):= A "N"one or
* op(A):= t(A) "T"ransposed */
F77_CALL(dtrmm)(rt ? "R" : "L", uplo_a_ch,
/*trans_A = */ tr ? "T" : "N", diag_a_ch, &n, &n, &alpha,
REAL(GET_SLOT(a, Matrix_xSym)), adims,
REAL(GET_SLOT(val, Matrix_xSym)), &n);
}
if(same_uplo) {
make_d_matrix_triangular(valx, a); /* set "other triangle" to 0 */
if(*diag_a_ch == 'U' && uDiag_b) /* result remains uni-diagonal */
SET_SLOT(val, Matrix_diagSym, duplicate(diag_a));
}
UNPROTECT(1);
return val;
}
SEXP dtrMatrix_as_matrix(SEXP from, SEXP keep_dimnames)
{
int *Dim = INTEGER(GET_SLOT(from, Matrix_DimSym));
int m = Dim[0], n = Dim[1];
SEXP val = PROTECT(allocMatrix(REALSXP, m, n));
make_d_matrix_triangular(Memcpy(REAL(val),
REAL(GET_SLOT(from, Matrix_xSym)), m * n),
from);
if(asLogical(keep_dimnames))
setAttrib(val, R_DimNamesSymbol, GET_SLOT(from, Matrix_DimNamesSym));
UNPROTECT(1);
return val;
}
#define GET_trMatrix_Diag(_C_TYPE_, _SEXPTYPE_, _SEXP_, _ONE_) \
int i, n = INTEGER(GET_SLOT(x, Matrix_DimSym))[0]; \
SEXP x_x = GET_SLOT(x, Matrix_xSym); \
\
SEXP ret = PROTECT(allocVector(_SEXPTYPE_, n)); \
_C_TYPE_ *rv = _SEXP_(ret), \
*xv = _SEXP_(x_x); \
\
if ('U' == diag_P(x)[0]) { \
for (i = 0; i < n; i++) rv[i] = _ONE_; \
} else { \
for (i = 0; i < n; i++) rv[i] = xv[i * (n + 1)]; \
} \
UNPROTECT(1); \
return ret
SEXP dtrMatrix_getDiag(SEXP x) {
GET_trMatrix_Diag(double, REALSXP, REAL, 1.);
}
SEXP ltrMatrix_getDiag(SEXP x) {
GET_trMatrix_Diag( int, LGLSXP, LOGICAL, 1);
}
#define SET_trMatrix_Diag(_C_TYPE_, _SEXP_) \
int n = INTEGER(GET_SLOT(x, Matrix_DimSym))[0]; \
SEXP ret = PROTECT(duplicate(x)); \
SEXP r_x = GET_SLOT(ret, Matrix_xSym); \
_C_TYPE_ *dv = _SEXP_(d), \
*rv = _SEXP_(r_x); \
\
if ('U' == diag_P(x)[0]) \
error(_("cannot set diag() as long as 'diag = \"U\"'")); \
for (int i = 0; i < n; i++) rv[i * (n + 1)] = dv[i]; \
\
UNPROTECT(1); \
return ret
SEXP dtrMatrix_setDiag(SEXP x, SEXP d) {
SET_trMatrix_Diag(double, REAL);
}
SEXP ltrMatrix_setDiag(SEXP x, SEXP d) {
SET_trMatrix_Diag( int, LOGICAL);
}
SEXP dtrMatrix_addDiag(SEXP x, SEXP d) {
int n = INTEGER(GET_SLOT(x, Matrix_DimSym))[0];
SEXP ret = PROTECT(duplicate(x)),
r_x = GET_SLOT(ret, Matrix_xSym);
double *dv = REAL(d), *rv = REAL(r_x);
if ('U' == diag_P(x)[0])
error(_("cannot add diag() as long as 'diag = \"U\"'"));
for (int i = 0; i < n; i++) rv[i * (n + 1)] += dv[i];
UNPROTECT(1);
return ret;
}
SEXP dtrMatrix_as_dtpMatrix(SEXP from)
{
SEXP val = PROTECT(NEW_OBJECT(MAKE_CLASS("dtpMatrix"))),
uplo = GET_SLOT(from, Matrix_uploSym),
diag = GET_SLOT(from, Matrix_diagSym),
dimP = GET_SLOT(from, Matrix_DimSym);
int n = *INTEGER(dimP);
SET_SLOT(val, Matrix_DimSym, duplicate(dimP));
SET_SLOT(val, Matrix_diagSym, duplicate(diag));
SET_SLOT(val, Matrix_uploSym, duplicate(uplo));
full_to_packed_double(
REAL(ALLOC_SLOT(val, Matrix_xSym, REALSXP, (n*(n+1))/2)),
REAL(GET_SLOT(from, Matrix_xSym)), n,
*CHAR(STRING_ELT(uplo, 0)) == 'U' ? UPP : LOW,
*CHAR(STRING_ELT(diag, 0)) == 'U' ? UNT : NUN);
SET_SLOT(val, Matrix_DimNamesSym,
duplicate(GET_SLOT(from, Matrix_DimNamesSym)));
UNPROTECT(1);
return val;
}
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