petsc-3.4.4 2014-03-13

MatSetUp

Sets up the internal matrix data structures for the later use.

Synopsis

#include "petscmat.h" 
PetscErrorCode  MatSetUp(Mat A)
Collective on Mat

Input Parameters

A -the Mat context

Notes

If the user has not set preallocation for this matrix then a default preallocation that is likely to be inefficient is used.

If a suitable preallocation routine is used, this function does not need to be called.

See the Performance chapter of the PETSc users manual for how to preallocate matrices

Keywords

Mat, setup

See Also

MatCreate(), MatDestroy()

Level:beginner
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/mat/examples/tutorials/ex8.c.html
src/ksp/ksp/examples/tutorials/ex1.c.html
src/ksp/ksp/examples/tutorials/ex2.c.html
src/ksp/ksp/examples/tutorials/ex5.c.html
src/ksp/ksp/examples/tutorials/ex8.c.html
src/ksp/ksp/examples/tutorials/ex8g.c.html
src/ksp/ksp/examples/tutorials/ex9.c.html
src/ksp/ksp/examples/tutorials/ex11.c.html
src/ksp/ksp/examples/tutorials/ex12.c.html
src/ksp/ksp/examples/tutorials/ex15.c.html
src/ksp/ksp/examples/tutorials/ex16.c.html