From octave-sources-request at bevo dot che dot wisc dot edu Mon Aug  6 17:33:22 2001
Subject: Optimization: Replace NaN by Inf
From: Etienne Grossmann <etienne at anonimo dot isr dot ist dot utl dot pt>
To: help-octave at bevo dot che dot wisc dot edu, octave-sources@bevo.che.wisc.edu
CC: etienne at isr dot ist dot utl dot pt, jeremy.denise@inria.fr
Date: Mon, 06 Aug 2001 18:14:19 +0100


  Hello,

  when optimizing a function 'f', I am tempted to replace any NaNs
that it returns by Infs. This way, the returned value can be compared
w/ other values, and the optimization algorithm is happy.

  Can anyone think of a reason not to replace NaNs by Infs inside an
optimization algorithm?

  If not, I'll have my various optimization functions do the
replacement. 

  Etienne