MatZeroRowsIS

Zeros all entries (except possibly the main diagonal) of a set of rows of a matrix.

Synopsis

#include "petscmat.h" 
PetscErrorCode MatZeroRowsIS(Mat mat, IS is, PetscScalar diag, Vec x, Vec b)

Collective

Input Parameters

• mat - the matrix

• is - index set of rows to remove (if NULL then no row is removed)

• diag - value put in all diagonals of eliminated rows

• 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 MatZeroRows() for details on how this routine operates.

See Also

Matrices, Mat, MatZeroRows(), MatZeroRowsColumns(), MatZeroRowsLocalIS(), MatZeroRowsStencil(), MatZeroEntries(), MatZeroRowsLocal(), MatSetOption(), MatZeroRowsColumnsLocal(), MatZeroRowsColumnsLocalIS(), MatZeroRowsColumnsIS(), MatZeroRowsColumnsStencil()

Level

intermediate

Location

src/mat/interface/matrix.c

Examples

src/ksp/ksp/tutorials/ex43.c

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