MatQRFactorNumeric#

Performs numeric QR factorization of a matrix. Call this routine after first calling MatGetFactor(), and MatQRFactorSymbolic().

Synopsis#

#include "petscmat.h" 
PetscErrorCode MatQRFactorNumeric(Mat fact, Mat mat, const MatFactorInfo *info)

Collective

Input Parameters#

fact - the factor matrix obtained with MatGetFactor()
mat - the matrix
info - options for factorization

Notes#

See MatQRFactor() for in-place factorization.

Most users should employ the KSP interface for linear solvers instead of working directly with matrix algebra routines such as this. See, e.g., KSPCreate().

Developer Note#

The Fortran interface is not autogenerated as the interface definition cannot be generated correctly [due to MatFactorInfo]

Level#

developer

Location#

src/mat/interface/matrix.c

Implementations#

MatQRFactorNumeric_SPQR in src/mat/impls/aij/seq/spqr/aijspqr.c
MatQRFactorNumeric_SeqDense in src/mat/impls/dense/seq/dense.c

Edit on GitLab

Index of all Mat routines
Table of Contents for all manual pages
Index of all manual pages