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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.

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