petsc-3.11.4 2019-09-28
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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

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);

See Also

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

Level

intermediate

Location

src/mat/interface/matrix.c

Implementations

MatSetRandom_MPIAIJ in src/mat/impls/aij/mpi/mpiaij.c
MatSetRandom_SeqAIJ in src/mat/impls/aij/seq/aij.c
MatSetRandom_MPIDense in src/mat/impls/dense/mpi/mpidense.c
MatSetRandom_SeqDense in src/mat/impls/dense/seq/dense.c
MatSetRandom_Nest in src/mat/impls/nest/matnest.c
MatSetRandom_MPISELL in src/mat/impls/sell/mpi/mpisell.c

Index of all Mat routines
Table of Contents for all manual pages
Index of all manual pages