petsc-3.7.5 2017-01-01
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MatComputeBandwidth

 Calculate the full bandwidth of the matrix, meaning the width 2k+1 where k diagonals on either side are sufficient to contain all the matrix nonzeros.

Synopsis

#include "petscmat.h"  
PetscErrorCode MatComputeBandwidth(Mat A, PetscReal fraction, PetscInt *bw)
Collective on Mat

Input Parameters

A - The Mat
fraction - An optional percentage of the Frobenius norm of the matrix that the bandwidth should enclose

Output Parameter

bw -The matrix bandwidth

See Also

DMPlexCreate(), DMPlexSetConeSize(), DMPlexSetChart()

Level:beginner
Location:src/mat/utils/bandwidth.c
Index of all Mat routines
Table of Contents for all manual pages
Index of all manual pages