petsc-dev 2014-07-25
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MatSetRandom

Sets all components of a matrix to random numbers. For sparse matrices that have been preallocated it randomly selects appropriate locations

Synopsis

#include "petscmat.h" 
PetscErrorCode  MatSetRandom(Mat x,PetscRandom rctx)
Logically Collective on Vec

Input Parameters

x - the vector
rctx - the random number context, formed by PetscRandomCreate(), or NULL and it will create one internally.

Output Parameter

x -the vector

Example of Usage

     PetscRandomCreate(PETSC_COMM_WORLD,&rctx);
     VecSetRandom(x,rctx);
     PetscRandomDestroy(rctx);

See Also

MatZeroEntries(), MatSetValues(), PetscRandomCreate(), PetscRandomDestroy()

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