1*c4762a1bSJed Brown 2*c4762a1bSJed Brown static char help[] = "Tests C=A^T*B via MatTranspose() and MatMatMult(). \n\ 3*c4762a1bSJed Brown Contributed by Alexander Grayver, Jan. 2012 \n\n"; 4*c4762a1bSJed Brown /* Example: 5*c4762a1bSJed Brown mpiexec -n <np> ./ex165 -fA A.dat -fB B.dat -view_C 6*c4762a1bSJed Brown */ 7*c4762a1bSJed Brown 8*c4762a1bSJed Brown #include <petscmat.h> 9*c4762a1bSJed Brown int main(int argc,char **args) 10*c4762a1bSJed Brown { 11*c4762a1bSJed Brown PetscErrorCode ierr; 12*c4762a1bSJed Brown Mat A,AT,B,C; 13*c4762a1bSJed Brown PetscViewer viewer; 14*c4762a1bSJed Brown PetscBool flg; 15*c4762a1bSJed Brown char file[PETSC_MAX_PATH_LEN]; 16*c4762a1bSJed Brown 17*c4762a1bSJed Brown ierr = PetscInitialize(&argc,&args,(char*)0,help);if (ierr) return ierr; 18*c4762a1bSJed Brown ierr = PetscOptionsGetString(NULL,NULL,"-fA",file,PETSC_MAX_PATH_LEN,&flg);CHKERRQ(ierr); 19*c4762a1bSJed Brown if (!flg) SETERRQ(PETSC_COMM_WORLD,PETSC_ERR_USER,"Input fileA not specified"); 20*c4762a1bSJed Brown ierr = PetscViewerBinaryOpen(PETSC_COMM_WORLD,file,FILE_MODE_READ,&viewer);CHKERRQ(ierr); 21*c4762a1bSJed Brown ierr = MatCreate(PETSC_COMM_WORLD,&A);CHKERRQ(ierr); 22*c4762a1bSJed Brown ierr = MatSetType(A,MATAIJ);CHKERRQ(ierr); 23*c4762a1bSJed Brown ierr = MatLoad(A,viewer);CHKERRQ(ierr); 24*c4762a1bSJed Brown ierr = PetscViewerDestroy(&viewer);CHKERRQ(ierr); 25*c4762a1bSJed Brown 26*c4762a1bSJed Brown ierr = PetscOptionsGetString(NULL,NULL,"-fB",file,PETSC_MAX_PATH_LEN,&flg);CHKERRQ(ierr); 27*c4762a1bSJed Brown if (!flg) SETERRQ(PETSC_COMM_WORLD,PETSC_ERR_USER,"Input fileB not specified"); 28*c4762a1bSJed Brown ierr = PetscViewerBinaryOpen(PETSC_COMM_WORLD,file,FILE_MODE_READ,&viewer);CHKERRQ(ierr); 29*c4762a1bSJed Brown ierr = MatCreate(PETSC_COMM_WORLD,&B);CHKERRQ(ierr); 30*c4762a1bSJed Brown ierr = MatSetType(B,MATDENSE);CHKERRQ(ierr); 31*c4762a1bSJed Brown ierr = MatLoad(B,viewer);CHKERRQ(ierr); 32*c4762a1bSJed Brown ierr = PetscViewerDestroy(&viewer);CHKERRQ(ierr); 33*c4762a1bSJed Brown 34*c4762a1bSJed Brown ierr = MatTranspose(A,MAT_INITIAL_MATRIX,&AT);CHKERRQ(ierr); 35*c4762a1bSJed Brown ierr = MatMatMult(AT,B,MAT_INITIAL_MATRIX,PETSC_DEFAULT,&C); 36*c4762a1bSJed Brown 37*c4762a1bSJed Brown ierr = PetscOptionsHasName(NULL,NULL,"-view_C",&flg);CHKERRQ(ierr); 38*c4762a1bSJed Brown if (flg) { 39*c4762a1bSJed Brown ierr = PetscViewerBinaryOpen(PETSC_COMM_WORLD,"C.dat",FILE_MODE_WRITE,&viewer);CHKERRQ(ierr); 40*c4762a1bSJed Brown ierr = PetscViewerPushFormat(viewer,PETSC_VIEWER_NATIVE);CHKERRQ(ierr); 41*c4762a1bSJed Brown ierr = MatView(C,viewer);CHKERRQ(ierr); 42*c4762a1bSJed Brown ierr = PetscViewerPopFormat(viewer);CHKERRQ(ierr); 43*c4762a1bSJed Brown ierr = PetscViewerDestroy(&viewer);CHKERRQ(ierr); 44*c4762a1bSJed Brown } 45*c4762a1bSJed Brown ierr = MatDestroy(&A);CHKERRQ(ierr); 46*c4762a1bSJed Brown ierr = MatDestroy(&B);CHKERRQ(ierr); 47*c4762a1bSJed Brown ierr = MatDestroy(&AT);CHKERRQ(ierr); 48*c4762a1bSJed Brown ierr = MatDestroy(&C);CHKERRQ(ierr); 49*c4762a1bSJed Brown ierr = PetscFinalize(); 50*c4762a1bSJed Brown return ierr; 51*c4762a1bSJed Brown } 52