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Re: [Help-glpk] typo in mip gap formula on wikibook page
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From: |
Michael Hennebry |
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Subject: |
Re: [Help-glpk] typo in mip gap formula on wikibook page |
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Date: |
Fri, 26 Apr 2013 17:00:07 -0500 (CDT) |
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User-agent: |
Alpine 1.00 (DEB 882 2007-12-20) |
On Fri, 26 Apr 2013, Andrew Makhorin wrote:
There is a typo in the formula for computing mip gap on the page
http://en.wikibooks.org/wiki/GLPK/Terminal_output
The denominator should be |best_mip| + eps.
I'd suggest that a better denominator would be |best_mip - root_lp|
That would make the formula immune to shifts and scalings.
It would also ensure that the gap was never greater than 100% .
--
Michael address@hidden
"On Monday, I'm gonna have to tell my kindergarten class,
whom I teach not to run with scissors,
that my fiance ran me through with a broadsword." -- Lily