petsc-3.12.5 2020-03-29

MatSetRandom

Sets all components of a matrix to random numbers. For sparse matrices that have been preallocated but not been assembled it randomly selects appropriate locations, for sparse matrices that already have locations it fills the locations with random numbers

Synopsis

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

Logically Collective on Mat

Input Parameters

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

Output Parameter

x -the matrix

Example of Usage

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

Level

intermediate

MatSetRandom

Synopsis

Input Parameters

Output Parameter

Example of Usage

See Also

Level

Location

Examples

Implementations