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

[GLENN RHOADS]

On Thu, 24 Feb 2011 17:50:47 -0600 (CST)
 Michael Hennebry <address@hidden> wrote:
> 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 .

Well, I actually had to get rid of a few xprintf() calls (I commented
them out).