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RE: NaN and Surf function

From: Kyle Snow
Subject: RE: NaN and Surf function
Date: Fri, 22 Sep 2006 15:04:07 -0700

Thanks to both of you for the information. I will keep watching for a
new 2.9 binary version for Windows.


-----Original Message-----
From: David Bateman [mailto:address@hidden 
Sent: Friday, September 22, 2006 5:54 PM
To: David Grohmann
Cc: Help-Octave; Kyle Snow
Subject: Re: NaN and Surf function

David Grohmann wrote:
> David Bateman wrote:
>> Kyle Snow wrote:
>>> My question is regarding the handling of NaN values for the
>>> in the function
>>> surf(x,y,Z).
>>> These values exist because my gridded data set has an irregular
>>> boundary. The surf command does not seem to handle this well. In
>>> these data points are simply not plotted, and the surf plot for the
>>> non-NaN points looks fine. Is there a way I can get this to work
>>> Octave's surf function?
>>> Note that I am running WindowsXp, and I downloaded the exe file from
>>> I have not obtained the Octave source code.
>> There is a difference between octave 2.1 and matlab, in that the
>> are removed from the data before plotting in octave, whereas matlab
>> them to flag unconnected line segments. Octave 2.9 was adapted to
>> matlab's behavior. The change is not too major, but does mean a
>> level of backporting from 2.9 to 2.1 and a recompile.. Better to go
to a
>> 2.9.x release if you can. Sorry I still haven't gotten back to my
>> 2.9 release, but will one day (if someone doesn't what to take it off
>> hands), so you might be limited to linux releases of 2.9 at the
>> D.
>> _______________________________________________
>> Help-octave mailing list
>> address@hidden
> I was evaluating a windows octave a while back and found this windows
> version, it comes with 2.9.4 I don't know if it solves your problem.
> It has a gui and the command line interface.

This is my binary of octave, with Sebastien's QT4 gui front-end. This
has certain limitations and known bugs. particulaly a scrambled error
message bug that in fact appears to be a bug in the string class of
3.3.x compiler under mingw/cingwin that might be fixed with a later
compiler. It is also missing atlas/lapack libraries, and so is slower
than it needs to be.. As I said, I'll do something about this, unless
someone else (who actually runs windows and cares) steps forward to
support a windows package of 2.9 and take this task off my hands..


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