1 2 static char help[] = "Tests the various routines in MatBAIJ format.\n\ 3 Input arguments are:\n\ 4 -f <input_file> : file to load. For example see $PETSC_DIR/share/petsc/datafiles/matrices\n\n"; 5 6 #include <petscmat.h> 7 8 int main(int argc,char **args) 9 { 10 Mat A,B,C; 11 PetscViewer va,vb,vc; 12 Vec x,y; 13 PetscInt i,j,row,m,n,ncols1,ncols2,ct,m2,n2; 14 const PetscInt *cols1,*cols2; 15 char file[PETSC_MAX_PATH_LEN]; 16 PetscBool tflg; 17 PetscScalar rval; 18 const PetscScalar *vals1,*vals2; 19 PetscReal norm1,norm2,rnorm; 20 PetscRandom r; 21 22 CHKERRQ(PetscInitialize(&argc,&args,(char*)0,help)); 23 CHKERRQ(PetscOptionsGetString(NULL,NULL,"-f",file,sizeof(file),NULL)); 24 25 /* Load the matrix as AIJ format */ 26 CHKERRQ(PetscViewerBinaryOpen(PETSC_COMM_WORLD,file,FILE_MODE_READ,&va)); 27 CHKERRQ(MatCreate(PETSC_COMM_WORLD,&A)); 28 CHKERRQ(MatSetType(A,MATSEQAIJ)); 29 CHKERRQ(MatLoad(A,va)); 30 CHKERRQ(PetscViewerDestroy(&va)); 31 32 /* Load the matrix as BAIJ format */ 33 CHKERRQ(PetscViewerBinaryOpen(PETSC_COMM_WORLD,file,FILE_MODE_READ,&vb)); 34 CHKERRQ(MatCreate(PETSC_COMM_WORLD,&B)); 35 CHKERRQ(MatSetType(B,MATSEQBAIJ)); 36 CHKERRQ(MatLoad(B,vb)); 37 CHKERRQ(PetscViewerDestroy(&vb)); 38 39 /* Load the matrix as BAIJ format */ 40 CHKERRQ(PetscViewerBinaryOpen(PETSC_COMM_WORLD,file,FILE_MODE_READ,&vc)); 41 CHKERRQ(MatCreate(PETSC_COMM_WORLD,&C)); 42 CHKERRQ(MatSetType(C,MATSEQBAIJ)); 43 CHKERRQ(MatSetFromOptions(C)); 44 CHKERRQ(MatLoad(C,vc)); 45 CHKERRQ(PetscViewerDestroy(&vc)); 46 47 CHKERRQ(MatGetSize(A,&m,&n)); 48 CHKERRQ(MatGetSize(B,&m2,&n2)); 49 PetscCheckFalse(m!=m2,PETSC_COMM_SELF,PETSC_ERR_ARG_SIZ,"Matrices are of different size. Cannot run this example"); 50 51 /* Test MatEqual() */ 52 CHKERRQ(MatEqual(B,C,&tflg)); 53 PetscCheck(tflg,PETSC_COMM_SELF,PETSC_ERR_PLIB,"MatEqual() failed"); 54 55 /* Test MatGetDiagonal() */ 56 CHKERRQ(VecCreateSeq(PETSC_COMM_SELF,m,&x)); 57 CHKERRQ(VecCreateSeq(PETSC_COMM_SELF,m,&y)); 58 59 CHKERRQ(MatGetDiagonal(A,x)); 60 CHKERRQ(MatGetDiagonal(B,y)); 61 62 CHKERRQ(VecEqual(x,y,&tflg)); 63 PetscCheck(tflg,PETSC_COMM_SELF,PETSC_ERR_PLIB,"MatGetDiagonal() failed"); 64 65 /* Test MatDiagonalScale() */ 66 CHKERRQ(PetscRandomCreate(PETSC_COMM_SELF,&r)); 67 CHKERRQ(PetscRandomSetFromOptions(r)); 68 CHKERRQ(VecSetRandom(x,r)); 69 CHKERRQ(VecSetRandom(y,r)); 70 71 CHKERRQ(MatDiagonalScale(A,x,y)); 72 CHKERRQ(MatDiagonalScale(B,x,y)); 73 CHKERRQ(MatMult(A,x,y)); 74 CHKERRQ(VecNorm(y,NORM_2,&norm1)); 75 CHKERRQ(MatMult(B,x,y)); 76 CHKERRQ(VecNorm(y,NORM_2,&norm2)); 77 rnorm = ((norm1-norm2)*100)/norm1; 78 PetscCheckFalse(rnorm<-0.1 || rnorm>0.01,PETSC_COMM_SELF,PETSC_ERR_PLIB,"MatDiagonalScale() failed Norm1 %g Norm2 %g",(double)norm1,(double)norm2); 79 80 /* Test MatGetRow()/ MatRestoreRow() */ 81 for (ct=0; ct<100; ct++) { 82 CHKERRQ(PetscRandomGetValue(r,&rval)); 83 row = (int)(rval*m); 84 CHKERRQ(MatGetRow(A,row,&ncols1,&cols1,&vals1)); 85 CHKERRQ(MatGetRow(B,row,&ncols2,&cols2,&vals2)); 86 87 for (i=0,j=0; i<ncols1 && j<ncols2; i++) { 88 while (cols2[j] != cols1[i]) j++; 89 PetscCheckFalse(vals1[i] != vals2[j],PETSC_COMM_SELF,PETSC_ERR_PLIB,"MatGetRow() failed - vals incorrect."); 90 } 91 PetscCheckFalse(i<ncols1,PETSC_COMM_SELF,PETSC_ERR_PLIB,"MatGetRow() failed - cols incorrect"); 92 93 CHKERRQ(MatRestoreRow(A,row,&ncols1,&cols1,&vals1)); 94 CHKERRQ(MatRestoreRow(B,row,&ncols2,&cols2,&vals2)); 95 } 96 97 CHKERRQ(MatDestroy(&A)); 98 CHKERRQ(MatDestroy(&B)); 99 CHKERRQ(MatDestroy(&C)); 100 CHKERRQ(VecDestroy(&x)); 101 CHKERRQ(VecDestroy(&y)); 102 CHKERRQ(PetscRandomDestroy(&r)); 103 CHKERRQ(PetscFinalize()); 104 return 0; 105 } 106 107 /*TEST 108 109 build: 110 requires: !complex 111 112 test: 113 args: -f ${DATAFILESPATH}/matrices/cfd.1.10 -mat_block_size 5 114 requires: !complex double datafilespath !defined(PETSC_USE_64BIT_INDICES) 115 116 TEST*/ 117