xref: /petsc/src/mat/tests/ex138.c (revision 327415f76d85372a4417cf1aaa14db707d4d6c04)

static char help[] = "Tests MatGetColumnNorms()/Sums()/Means() for matrix read from file.";

#include <petscmat.h>

int main(int argc,char **args)
{
  Mat            A;
  PetscReal      *reductions_real;
  PetscScalar    *reductions_scalar;
  char           file[PETSC_MAX_PATH_LEN];
  PetscBool      flg;
  PetscViewer    fd;
  PetscInt       n;
  PetscMPIInt    rank;

  PetscFunctionBeginUser;
  PetscCall(PetscInitialize(&argc,&args,(char*)0,help));
  PetscCallMPI(MPI_Comm_rank(PETSC_COMM_WORLD,&rank));
  PetscCall(PetscOptionsGetString(NULL,NULL,"-f",file,sizeof(file),&flg));
  PetscCheck(flg,PETSC_COMM_WORLD,PETSC_ERR_USER,"Must indicate binary file with the -f option");
  PetscCall(PetscViewerBinaryOpen(PETSC_COMM_WORLD,file,FILE_MODE_READ,&fd));
  PetscCall(MatCreate(PETSC_COMM_WORLD,&A));
  PetscCall(MatSetFromOptions(A));
  PetscCall(MatLoad(A,fd));
  PetscCall(PetscViewerDestroy(&fd));

  PetscCall(MatGetSize(A,NULL,&n));
  PetscCall(PetscMalloc1(n,&reductions_real));
  PetscCall(PetscMalloc1(n,&reductions_scalar));

  PetscCall(MatGetColumnNorms(A,NORM_2,reductions_real));
  if (rank == 0) {
    PetscCall(PetscPrintf(PETSC_COMM_SELF,"NORM_2:\n"));
    PetscCall(PetscRealView(n,reductions_real,PETSC_VIEWER_STDOUT_SELF));
  }

  PetscCall(MatGetColumnNorms(A,NORM_1,reductions_real));
  if (rank == 0) {
    PetscCall(PetscPrintf(PETSC_COMM_SELF,"NORM_1:\n"));
    PetscCall(PetscRealView(n,reductions_real,PETSC_VIEWER_STDOUT_SELF));
  }

  PetscCall(MatGetColumnNorms(A,NORM_INFINITY,reductions_real));
  if (rank == 0) {
    PetscCall(PetscPrintf(PETSC_COMM_SELF,"NORM_INFINITY:\n"));
    PetscCall(PetscRealView(n,reductions_real,PETSC_VIEWER_STDOUT_SELF));
  }

  PetscCall(MatGetColumnSums(A,reductions_scalar));
  if (rank == 0) {
    PetscCall(PetscPrintf(PETSC_COMM_SELF,"REDUCTION_SUM:\n"));
    PetscCall(PetscScalarView(n,reductions_scalar,PETSC_VIEWER_STDOUT_SELF));
  }

  PetscCall(MatGetColumnMeans(A,reductions_scalar));
  if (rank == 0) {
    PetscCall(PetscPrintf(PETSC_COMM_SELF,"REDUCTION_MEAN:\n"));
    PetscCall(PetscScalarView(n,reductions_scalar,PETSC_VIEWER_STDOUT_SELF));
  }

  PetscCall(PetscFree(reductions_real));
  PetscCall(PetscFree(reductions_scalar));
  PetscCall(MatDestroy(&A));
  PetscCall(PetscFinalize());
  return 0;
}

/*TEST

   test:
      suffix: 1
      nsize: 2
      requires: datafilespath !complex double !defined(PETSC_USE_64BIT_INDICES)
      args: -f ${DATAFILESPATH}/matrices/small -mat_type aij
      output_file: output/ex138.out

   test:
      suffix: 2
      nsize: {{1 2}}
      requires: datafilespath !complex double !defined(PETSC_USE_64BIT_INDICES)
      args: -f ${DATAFILESPATH}/matrices/small -mat_type baij -matload_block_size {{2 3}}
      output_file: output/ex138.out

   test:
      suffix: complex
      nsize: 2
      requires: datafilespath complex double !defined(PETSC_USE_64BIT_INDICES)
      args: -f ${DATAFILESPATH}/matrices/nimrod/small_112905 -mat_type aij
      output_file: output/ex138_complex.out
      filter: grep -E "\ 0:|1340:|1344:"

TEST*/