[Octave-bug-tracker] [bug #32040] ppval fails after use of fnder

[Ben Abbott]

Follow-up Comment #1, bug #32040 (project octave):

I noticed the demo for mkpp no longer runs. Perhaps the changeset which
improved the compatibility with ML has resulted in breaking some older code.
The changeset is linked to below.

http://hg.savannah.gnu.org/hgweb/octave/rev/31900e17b5f5

However, it doesn't look to me like the problem is with mkpp, but with fnder.
Looking at ppd, there are 9 different regions for which polynomials must be
specified. However, ppd.P only includes coefficients for 8 regions. Thus when
the evaluating within the last region an error occurs.


dyi = ppval(ppd,ppd.x(1:end-2));
dyi = ppval(ppd,ppd.x(1:end-1)-eps);
dyi = ppval(ppd,ppd.x(1:end-1));
error: ppval: A(I,J,...): index to dimension 2 out of bounds; value 9 out of
bound 8


I've cc'd Kai Habel.

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