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

[Michael Hennebry]

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."