petsc-3.4.4 2014-03-13

MatGetColumnIJ

Returns the compressed column storage i and j indices for sequential matrices.

Synopsis

#include "petscmat.h" 
PetscErrorCode MatGetColumnIJ(Mat mat,PetscInt shift,PetscBool symmetric,PetscBool inodecompressed,PetscInt *n,const PetscInt *ia[],const PetscInt *ja[],PetscBool  *done)
Collective on Mat

Input Parameters

mat - the matrix
shift - 1 or zero indicating we want the indices starting at 0 or 1
symmetric - PETSC_TRUE or PETSC_FALSE indicating the matrix data structure should be symmetrized
inodecompressed - PETSC_TRUE or PETSC_FALSE indicating if the nonzero structure of the inodes or the nonzero elements is wanted. For BAIJ matrices the compressed version is always used.

Output Parameters

n - number of columns in the (possibly compressed) matrix
ia - the column pointers
ja - the row indices
done - PETSC_TRUE or PETSC_FALSE, indicating whether the values have been returned

See Also

MatGetRowIJ(), MatRestoreColumnIJ()

Level:developer
Location:
src/mat/interface/matrix.c
Index of all Mat routines
Table of Contents for all manual pages
Index of all manual pages