petsc-3.7.5 2017-01-01
MatZeroEntries
Zeros all entries of a matrix. For sparse matrices this routine retains the old nonzero structure.
Synopsis
#include "petscmat.h"
PetscErrorCode MatZeroEntries(Mat mat)
Logically Collective on Mat
Input Parameters
mat -the matrix
Notes: If the matrix was not preallocated then a default, likely poor preallocation will be set in the matrix, so this should be called after the preallocation phase.
See the Performance chapter of the users manual for information on preallocating matrices.
See Also
MatZeroRows()
Level:intermediate
Location:src/mat/interface/matrix.c
Index of all Mat routines
Table of Contents for all manual pages
Index of all manual pages
Examples
src/ksp/ksp/examples/tutorials/ex4.c.html
src/ksp/ksp/examples/tutorials/ex5.c.html
src/ksp/ksp/examples/tutorials/ex9.c.html
src/ksp/ksp/examples/tutorials/ex42.c.html
src/ksp/ksp/examples/tutorials/ex43.c.html
src/ksp/ksp/examples/tutorials/ex49.c.html
src/snes/examples/tutorials/ex7.c.html
src/snes/examples/tutorials/ex48.c.html
src/snes/examples/tutorials/ex58.c.html
src/ts/examples/tutorials/ex10.c.html
src/ts/examples/tutorials/ex14.c.html