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Re: [Help-glpk] MathProg and column sequencing
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From: |
Andrew Makhorin |
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Subject: |
Re: [Help-glpk] MathProg and column sequencing |
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Date: |
Tue, 6 Mar 2007 21:02:16 +0300 |
> MathProg and column sequencingI want to use *lpx_read_model.
>
> If 'var x' is put in front of 'var y' in the model file, will then x
> receive a lower column number than y?
>
> If I use 'var x{i in I, j in J}' in the model file where I and J are
> ordered sets of numbers, will then x[1,2] receive a lower column number
> than x[2,1]?
No. Ordinal numbers assigned to elemental variables depend on many
factors, so their ordering is unpredictable.