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]
See Also#
Matrices, Mat, Matrix Factorization, MatFactorInfo, MatGetFactor(), MatQRFactor(), MatQRFactorSymbolic(), MatLUFactor()
Level#
developer
Location#
Implementations#
MatQRFactorNumeric_SPQR() in src/mat/impls/aij/seq/spqr/aijspqr.c
MatQRFactorNumeric_SeqDense() in src/mat/impls/dense/seq/dense.c
Index of all Mat routines
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Index of all manual pages