MatSetRandom#
Sets all components of a matrix to random numbers.
Synopsis#
#include "petscmat.h"
PetscErrorCode MatSetRandom(Mat x, PetscRandom rctx)
Logically Collective
Input Parameters#
x - the matrix
rctx - the
PetscRandom
object, formed byPetscRandomCreate()
, orNULL
and it will create one internally.
Output Parameter#
x - the matrix
Example of Usage#
PetscRandomCreate(PETSC_COMM_WORLD,&rctx);
MatSetRandom(x,rctx);
PetscRandomDestroy(rctx);
Note#
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. It generates an error if used on sparse matrices that have not been preallocated.
See Also#
Mat
, PetscRandom
, PetscRandomCreate()
, MatZeroEntries()
, MatSetValues()
, PetscRandomCreate()
, PetscRandomDestroy()
Level#
intermediate
Location#
Examples#
src/mat/tutorials/ex9.c.html
src/ksp/ksp/tutorials/ex76.c.html
src/ksp/ksp/tutorials/ex76f.F90.html
src/ksp/ksp/tutorials/ex77.c.html
src/ksp/ksp/tutorials/ex77f.F90.html
src/ksp/ksp/tutorials/ex79.c.html
src/ksp/ksp/tutorials/ex81.c.html
src/tao/tutorials/ex4.c.html
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_SeqDenseCUDA in src/mat/impls/dense/seq/cuda/densecuda.cu
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