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Re: [Help-glpk] glp_transform_row/col: len' <= len or other means of sel
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From: |
Andrew Makhorin |
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Subject: |
Re: [Help-glpk] glp_transform_row/col: len' <= len or other means of selecting ind/val array lengths? |
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Date: |
Wed, 30 Apr 2014 04:08:42 +0400 |
> When using glp_transform_row/col, is there a guarantee that len' <= len
No, len' can be greater than len.
> or is there another means of selecting an appropriate length to use for
> allocating memory for the arrays ind and val?
Glp_transform_row guarantees that 0 <= len' <= n, where n is the current
number of columns in the glp_prob object, and glp_transform_col
guarantees that 0 <= len' <= m, where m is the current number of rows.
So you should reserve 1+n or 1+m locations for ind and val (since
location 0 is not used).
For more details please consult the glpk reference manual.