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Re: [Help-glpk] Compare two matrices

From: address@hidden
Subject: Re: [Help-glpk] Compare two matrices
Date: Tue, 7 Aug 2007 07:34:43 -0400

Thanks again,

If anyone is interested.

My solution with a lot of help from Andrew Makhorin:

Problem: Compare two matrices, one including variables, the other including
parameters, both binary. Make sure that at most n changes can be made
between the two matrices.

Background: I use this for a scheduling programme that must make sure that
the schedule is not completely changed everytime a new one is computed.


Since both matrices are binaries, I did the following: SUM{a in A, b in B,
c in C} if OLD[a,b,c] = 1 then -1*(NEW[a,b,c]-OLD[a,b,c]) else
(NEW[a,b,c]-OLD[a,b,c] <= n;

It worked for me, maybe someone else can use it as well.

Kind regads,


Original Message:
From: Andrew Makhorin address@hidden
Date: Tue, 7 Aug 2007 14:48:59 +0400
To: address@hidden, address@hidden
Subject: Re: [Help-glpk] Compare two matrices

> I am trying to implement your information, however there is one
> small other problem. In the data section, how should I write down
> the values for the A[a,b,c] matrix?

Please see model train.mod in the subdirectory 'examples'.

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