1c4762a1bSJed Brown static char help[] = "Test MATMFFD for the rectangular case\n\n"; 2c4762a1bSJed Brown 3c4762a1bSJed Brown #include <petscmat.h> 4c4762a1bSJed Brown 5c4762a1bSJed Brown static PetscErrorCode myF(void* ctx,Vec x,Vec y) 6c4762a1bSJed Brown { 7c4762a1bSJed Brown const PetscScalar *ax; 8c4762a1bSJed Brown PetscScalar *ay; 9c4762a1bSJed Brown PetscInt i,j,m,n; 10c4762a1bSJed Brown 11c4762a1bSJed Brown PetscFunctionBegin; 125f80ce2aSJacob Faibussowitsch CHKERRQ(VecGetArrayRead(x,&ax)); 135f80ce2aSJacob Faibussowitsch CHKERRQ(VecGetArray(y,&ay)); 145f80ce2aSJacob Faibussowitsch CHKERRQ(VecGetLocalSize(y,&m)); 155f80ce2aSJacob Faibussowitsch CHKERRQ(VecGetLocalSize(x,&n)); 16c4762a1bSJed Brown for (i=0;i<m;i++) { 17c4762a1bSJed Brown PetscScalar xx,yy; 18c4762a1bSJed Brown 19c4762a1bSJed Brown yy = 0.0; 20c4762a1bSJed Brown for (j=0;j<n;j++) { 21c4762a1bSJed Brown xx = PetscPowScalarInt(ax[j],i+1); 22c4762a1bSJed Brown yy += xx; 23c4762a1bSJed Brown } 24c4762a1bSJed Brown ay[i] = yy; 25c4762a1bSJed Brown } 265f80ce2aSJacob Faibussowitsch CHKERRQ(VecRestoreArray(y,&ay)); 275f80ce2aSJacob Faibussowitsch CHKERRQ(VecRestoreArrayRead(x,&ax)); 28c4762a1bSJed Brown PetscFunctionReturn(0); 29c4762a1bSJed Brown } 30c4762a1bSJed Brown 31c4762a1bSJed Brown int main(int argc,char **args) 32c4762a1bSJed Brown { 33c4762a1bSJed Brown Mat A,B; 34c4762a1bSJed Brown Vec base; 35c4762a1bSJed Brown PetscInt m = 3 ,n = 2; 36c4762a1bSJed Brown 37*b122ec5aSJacob Faibussowitsch CHKERRQ(PetscInitialize(&argc,&args,(char*)0,help)); 385f80ce2aSJacob Faibussowitsch CHKERRQ(PetscOptionsGetInt(NULL,NULL,"-n",&n,NULL)); 395f80ce2aSJacob Faibussowitsch CHKERRQ(PetscOptionsGetInt(NULL,NULL,"-m",&m,NULL)); 405f80ce2aSJacob Faibussowitsch CHKERRQ(MatCreateMFFD(PETSC_COMM_WORLD,PETSC_DECIDE,PETSC_DECIDE,m,n,&A)); 415f80ce2aSJacob Faibussowitsch CHKERRQ(MatCreateVecs(A,&base,NULL)); 425f80ce2aSJacob Faibussowitsch CHKERRQ(VecSet(base,2.0)); 435f80ce2aSJacob Faibussowitsch CHKERRQ(MatMFFDSetFunction(A,myF,NULL)); 445f80ce2aSJacob Faibussowitsch CHKERRQ(MatMFFDSetBase(A,base,NULL)); 455f80ce2aSJacob Faibussowitsch CHKERRQ(MatAssemblyBegin(A,MAT_FINAL_ASSEMBLY)); 465f80ce2aSJacob Faibussowitsch CHKERRQ(MatAssemblyEnd(A,MAT_FINAL_ASSEMBLY)); 475f80ce2aSJacob Faibussowitsch CHKERRQ(MatComputeOperator(A,NULL,&B)); 485f80ce2aSJacob Faibussowitsch CHKERRQ(VecDestroy(&base)); 495f80ce2aSJacob Faibussowitsch CHKERRQ(MatDestroy(&A)); 505f80ce2aSJacob Faibussowitsch CHKERRQ(MatDestroy(&B)); 51*b122ec5aSJacob Faibussowitsch CHKERRQ(PetscFinalize()); 52*b122ec5aSJacob Faibussowitsch return 0; 53c4762a1bSJed Brown } 54c4762a1bSJed Brown 55c4762a1bSJed Brown /*TEST 56c4762a1bSJed Brown 57c4762a1bSJed Brown test: 58c4762a1bSJed Brown nsize: {{1 2 3 4}} 59c4762a1bSJed Brown 60c4762a1bSJed Brown TEST*/ 61