1*c4762a1bSJed Brown static char help[] = "Test MATMFFD for the rectangular case\n\n"; 2*c4762a1bSJed Brown 3*c4762a1bSJed Brown #include <petscmat.h> 4*c4762a1bSJed Brown 5*c4762a1bSJed Brown static PetscErrorCode myF(void* ctx,Vec x,Vec y) 6*c4762a1bSJed Brown { 7*c4762a1bSJed Brown const PetscScalar *ax; 8*c4762a1bSJed Brown PetscScalar *ay; 9*c4762a1bSJed Brown PetscInt i,j,m,n; 10*c4762a1bSJed Brown PetscErrorCode ierr; 11*c4762a1bSJed Brown 12*c4762a1bSJed Brown PetscFunctionBegin; 13*c4762a1bSJed Brown ierr = VecGetArrayRead(x,&ax);CHKERRQ(ierr); 14*c4762a1bSJed Brown ierr = VecGetArray(y,&ay);CHKERRQ(ierr); 15*c4762a1bSJed Brown ierr = VecGetLocalSize(y,&m);CHKERRQ(ierr); 16*c4762a1bSJed Brown ierr = VecGetLocalSize(x,&n);CHKERRQ(ierr); 17*c4762a1bSJed Brown for (i=0;i<m;i++) { 18*c4762a1bSJed Brown PetscScalar xx,yy; 19*c4762a1bSJed Brown 20*c4762a1bSJed Brown yy = 0.0; 21*c4762a1bSJed Brown for (j=0;j<n;j++) { 22*c4762a1bSJed Brown xx = PetscPowScalarInt(ax[j],i+1); 23*c4762a1bSJed Brown yy += xx; 24*c4762a1bSJed Brown } 25*c4762a1bSJed Brown ay[i] = yy; 26*c4762a1bSJed Brown } 27*c4762a1bSJed Brown ierr = VecRestoreArray(y,&ay);CHKERRQ(ierr); 28*c4762a1bSJed Brown ierr = VecRestoreArrayRead(x,&ax);CHKERRQ(ierr); 29*c4762a1bSJed Brown PetscFunctionReturn(0); 30*c4762a1bSJed Brown } 31*c4762a1bSJed Brown 32*c4762a1bSJed Brown int main(int argc,char **args) 33*c4762a1bSJed Brown { 34*c4762a1bSJed Brown Mat A,B; 35*c4762a1bSJed Brown Vec base; 36*c4762a1bSJed Brown PetscInt m = 3 ,n = 2; 37*c4762a1bSJed Brown PetscErrorCode ierr; 38*c4762a1bSJed Brown 39*c4762a1bSJed Brown ierr = PetscInitialize(&argc,&args,(char*)0,help);if (ierr) return ierr; 40*c4762a1bSJed Brown ierr = PetscOptionsGetInt(NULL,NULL,"-n",&n,NULL);CHKERRQ(ierr); 41*c4762a1bSJed Brown ierr = PetscOptionsGetInt(NULL,NULL,"-m",&m,NULL);CHKERRQ(ierr); 42*c4762a1bSJed Brown ierr = MatCreateMFFD(PETSC_COMM_WORLD,PETSC_DECIDE,PETSC_DECIDE,m,n,&A);CHKERRQ(ierr); 43*c4762a1bSJed Brown ierr = MatCreateVecs(A,&base,NULL);CHKERRQ(ierr); 44*c4762a1bSJed Brown ierr = VecSet(base,2.0);CHKERRQ(ierr); 45*c4762a1bSJed Brown ierr = MatMFFDSetFunction(A,myF,NULL);CHKERRQ(ierr); 46*c4762a1bSJed Brown ierr = MatMFFDSetBase(A,base,NULL);CHKERRQ(ierr); 47*c4762a1bSJed Brown ierr = MatAssemblyBegin(A,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr); 48*c4762a1bSJed Brown ierr = MatAssemblyEnd(A,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr); 49*c4762a1bSJed Brown ierr = MatComputeOperator(A,NULL,&B);CHKERRQ(ierr); 50*c4762a1bSJed Brown ierr = VecDestroy(&base);CHKERRQ(ierr); 51*c4762a1bSJed Brown ierr = MatDestroy(&A);CHKERRQ(ierr); 52*c4762a1bSJed Brown ierr = MatDestroy(&B);CHKERRQ(ierr); 53*c4762a1bSJed Brown ierr = PetscFinalize(); 54*c4762a1bSJed Brown return ierr; 55*c4762a1bSJed Brown } 56*c4762a1bSJed Brown 57*c4762a1bSJed Brown /*TEST 58*c4762a1bSJed Brown 59*c4762a1bSJed Brown test: 60*c4762a1bSJed Brown nsize: {{1 2 3 4}} 61*c4762a1bSJed Brown 62*c4762a1bSJed Brown TEST*/ 63