MatZeroRowsColumnsIS#
Zeros all entries (except possibly the main diagonal) of a set of rows and columns of a matrix.
Synopsis#
#include "petscmat.h"
PetscErrorCode MatZeroRowsColumnsIS(Mat mat, IS is, PetscScalar diag, Vec x, Vec b)
Collective
Input Parameters#
mat - the matrix
is - the rows to zero
diag - value put in all diagonals of eliminated rows (0.0 will even eliminate diagonal entry)
x - optional vector of solutions for zeroed rows (other entries in vector are not used)
b - optional vector of right-hand side, that will be adjusted by provided solution
Note#
See MatZeroRowsColumns() for details on how this routine operates.
See Also#
Matrices, Mat, MatZeroRowsIS(), MatZeroRowsColumns(), MatZeroRowsLocalIS(), MatZeroRowsStencil(), MatZeroEntries(), MatZeroRowsLocal(), MatSetOption(),
MatZeroRowsColumnsLocal(), MatZeroRowsColumnsLocalIS(), MatZeroRows(), MatZeroRowsColumnsStencil()
Level#
intermediate
Location#
Examples#
src/ksp/ksp/tutorials/ex71.c
src/ksp/ksp/tutorials/ex84.c
Index of all Mat routines
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