1c4762a1bSJed Brown 2c4762a1bSJed Brown static char help[] = "Tests C=A^T*B via MatTranspose() and MatMatMult(). \n\ 3c4762a1bSJed Brown Contributed by Alexander Grayver, Jan. 2012 \n\n"; 4c4762a1bSJed Brown /* Example: 5c4762a1bSJed Brown mpiexec -n <np> ./ex165 -fA A.dat -fB B.dat -view_C 6c4762a1bSJed Brown */ 7c4762a1bSJed Brown 8c4762a1bSJed Brown #include <petscmat.h> 9c4762a1bSJed Brown int main(int argc,char **args) 10c4762a1bSJed Brown { 11c4762a1bSJed Brown PetscErrorCode ierr; 12c4762a1bSJed Brown Mat A,AT,B,C; 13c4762a1bSJed Brown PetscViewer viewer; 14c4762a1bSJed Brown PetscBool flg; 15c4762a1bSJed Brown char file[PETSC_MAX_PATH_LEN]; 16c4762a1bSJed Brown 17c4762a1bSJed Brown ierr = PetscInitialize(&argc,&args,(char*)0,help);if (ierr) return ierr; 18*5f80ce2aSJacob Faibussowitsch CHKERRQ(PetscOptionsGetString(NULL,NULL,"-fA",file,sizeof(file),&flg)); 192c71b3e2SJacob Faibussowitsch PetscCheckFalse(!flg,PETSC_COMM_WORLD,PETSC_ERR_USER,"Input fileA not specified"); 20*5f80ce2aSJacob Faibussowitsch CHKERRQ(PetscViewerBinaryOpen(PETSC_COMM_WORLD,file,FILE_MODE_READ,&viewer)); 21*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatCreate(PETSC_COMM_WORLD,&A)); 22*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatSetType(A,MATAIJ)); 23*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatLoad(A,viewer)); 24*5f80ce2aSJacob Faibussowitsch CHKERRQ(PetscViewerDestroy(&viewer)); 25c4762a1bSJed Brown 26*5f80ce2aSJacob Faibussowitsch CHKERRQ(PetscOptionsGetString(NULL,NULL,"-fB",file,sizeof(file),&flg)); 272c71b3e2SJacob Faibussowitsch PetscCheckFalse(!flg,PETSC_COMM_WORLD,PETSC_ERR_USER,"Input fileB not specified"); 28*5f80ce2aSJacob Faibussowitsch CHKERRQ(PetscViewerBinaryOpen(PETSC_COMM_WORLD,file,FILE_MODE_READ,&viewer)); 29*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatCreate(PETSC_COMM_WORLD,&B)); 30*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatSetType(B,MATDENSE)); 31*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatLoad(B,viewer)); 32*5f80ce2aSJacob Faibussowitsch CHKERRQ(PetscViewerDestroy(&viewer)); 33c4762a1bSJed Brown 34*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatTranspose(A,MAT_INITIAL_MATRIX,&AT)); 35*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatMatMult(AT,B,MAT_INITIAL_MATRIX,PETSC_DEFAULT,&C)); 36c4762a1bSJed Brown 37*5f80ce2aSJacob Faibussowitsch CHKERRQ(PetscOptionsHasName(NULL,NULL,"-view_C",&flg)); 38c4762a1bSJed Brown if (flg) { 39*5f80ce2aSJacob Faibussowitsch CHKERRQ(PetscViewerBinaryOpen(PETSC_COMM_WORLD,"C.dat",FILE_MODE_WRITE,&viewer)); 40*5f80ce2aSJacob Faibussowitsch CHKERRQ(PetscViewerPushFormat(viewer,PETSC_VIEWER_NATIVE)); 41*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatView(C,viewer)); 42*5f80ce2aSJacob Faibussowitsch CHKERRQ(PetscViewerPopFormat(viewer)); 43*5f80ce2aSJacob Faibussowitsch CHKERRQ(PetscViewerDestroy(&viewer)); 44c4762a1bSJed Brown } 45*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatDestroy(&A)); 46*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatDestroy(&B)); 47*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatDestroy(&AT)); 48*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatDestroy(&C)); 49c4762a1bSJed Brown ierr = PetscFinalize(); 50c4762a1bSJed Brown return ierr; 51c4762a1bSJed Brown } 52