petsc-3.9.4 2018-09-11

MatSetRandom

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

#include "petscmat.h" 
PetscErrorCode MatSetRandom(Mat x,PetscRandom rctx)

Logically Collective on Mat

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

x -the matrix

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

intermediate