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scaling for polyfit.m [patch]
From: |
Thomas Weber |
Subject: |
scaling for polyfit.m [patch] |
Date: |
Wed, 09 Aug 2006 22:38:33 +0200 |
Hi,
some time ago we had a bug[1] filed in Debian against polyfit.m; it
breaks down for large values of x (which is known and a problem in
Matlab as well).
Based on the idea of the bug reporter, I've changed the polyfit function
to always apply scaling, making it work for large x values.
The patch is attached; it includes a test with the data provided in the
bugreport.
One thing where I was unsure is which polynomial to use for calculating
the values of S; I've taken the scaled polynomial because I think most
people want the conditition value for the actual calculation.
[1] http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=348480
Regards
Thomas
polyfit.diff
Description: Text Data
- scaling for polyfit.m [patch],
Thomas Weber <=