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Re: [Help-glpk] [Fwd: Scaling: Which? and Suppressing output]

From: Michael Hennebry
Subject: Re: [Help-glpk] [Fwd: Scaling: Which? and Suppressing output]
Date: Thu, 24 Feb 2011 17:50:47 -0600 (CST)
User-agent: Alpine 1.00 (DEB 882 2007-12-20)

On Thu, 24 Feb 2011, GLENN RHOADS wrote:

A: min|aij| =  4.000e-01  max|aij| =  2.800e+00  ratio =  7.000e+00
Problem data seem to be well scaled

Thanks.  That solves the excessive output problem.
Any suggestions on which scaling method might be preferred for my
application?  I think what is happening is that some of the
coefficients are for all practical purposes effectively 0.  These
"effective zeroes" are being represented in the matrix as some very
small number, e.g. 7.2134e-32, whereas the other entries are of a
common everyday size like 8.2, or 0.34.  Which scaling method would be
preferred for handling this situation?

Are you sure?
According to the message, min|aij|=0.4 .

Michael   address@hidden
"Pessimist: The glass is half empty.
Optimist:   The glass is half full.
Engineer:   The glass is twice as big as it needs to be."

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