#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
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. | |
n | - number of columns in the (possibly compressed) matrix | |
ia | - the column pointers; that is ia[0] = 0, ia[col] = i[col-1] + number of elements in that col of the matrix | |
ja | - the row indices |