1 static char help[]= "Test MatSetRandom on MATMPIAIJ matrices\n\n"; 2 3 /* 4 Adapted from an example Contributed-by: Jakub Kruzik <jakub.kruzik@vsb.cz> 5 */ 6 #include <petscmat.h> 7 int main(int argc,char **args) 8 { 9 Mat A[2]; 10 PetscErrorCode ierr; 11 PetscReal nrm,tol=10*PETSC_SMALL; 12 PetscRandom rctx; 13 14 ierr = PetscInitialize(&argc,&args,(char*)0,help);if (ierr) return ierr; 15 CHKERRQ(PetscRandomCreate(PETSC_COMM_WORLD,&rctx)); 16 17 /* Call MatSetRandom on unassembled matrices */ 18 CHKERRQ(MatCreateAIJ(PETSC_COMM_WORLD,PETSC_DECIDE,PETSC_DECIDE,20,20,3,NULL,3,NULL,&A[0])); 19 CHKERRQ(MatCreateAIJ(PETSC_COMM_WORLD,PETSC_DECIDE,PETSC_DECIDE,20,20,3,NULL,3,NULL,&A[1])); 20 CHKERRQ(MatSetRandom(A[0],rctx)); 21 CHKERRQ(MatSetRandom(A[1],rctx)); 22 23 CHKERRQ(MatAXPY(A[0],1.0,A[1],DIFFERENT_NONZERO_PATTERN)); 24 CHKERRQ(MatAXPY(A[0],-1.0,A[0],SAME_NONZERO_PATTERN)); 25 CHKERRQ(MatNorm(A[0],NORM_1,&nrm)); 26 if (nrm > tol) CHKERRQ(PetscPrintf(PETSC_COMM_WORLD,"Error: MatNorm(), norm1=: %g\n",(double)nrm)); 27 28 /* Call MatSetRandom on assembled matrices */ 29 CHKERRQ(MatSetRandom(A[0],rctx)); 30 CHKERRQ(MatSetRandom(A[1],rctx)); 31 32 CHKERRQ(MatAXPY(A[0],1.0,A[1],DIFFERENT_NONZERO_PATTERN)); 33 CHKERRQ(MatAXPY(A[0],-1.0,A[0],SAME_NONZERO_PATTERN)); 34 CHKERRQ(MatNorm(A[0],NORM_1,&nrm)); 35 if (nrm > tol) CHKERRQ(PetscPrintf(PETSC_COMM_WORLD,"Error: MatNorm(), norm1=: %g\n",(double)nrm)); 36 37 CHKERRQ(MatDestroy(&A[0])); 38 CHKERRQ(MatDestroy(&A[1])); 39 CHKERRQ(PetscRandomDestroy(&rctx)); 40 ierr = PetscFinalize(); 41 return ierr; 42 } 43 44 /*TEST 45 test: 46 nsize: 3 47 TEST*/ 48