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## Re: [Help-glpk] Visualize Matrix A (in Ax = b)

**From**: |
Andrew Makhorin |

**Subject**: |
Re: [Help-glpk] Visualize Matrix A (in Ax = b) |

**Date**: |
Mon, 11 Aug 2008 23:19:50 +0400 |

>* Few days back, there was a discussion on the mailing list about*
>* sparse and dense constraint coefficient matrices. I thought it would*
>* be nice to be able to visualize matrix A and "see" how much sparse it*
>* is. This might help verify, understand and debug LP/MIP models created*
>* using MathProg.*
Glpk includes some internal routines for such purpose (see glpspm.c),
in particular, spm_show_mat to write the sparse matrix pattern in bitmap
format. However, I do not know if it is reasonable to carry out such
routines on api level.