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Re: Octaviz help, general question about plotting scattered


From: Jordi Gutiérrez Hermoso
Subject: Re: Octaviz help, general question about plotting scattered
Date: Wed, 18 Jul 2007 21:53:48 -0500

On 18/07/07, Jonathan Stickel <address@hidden> wrote:
You can use the function griddata.m (geometry package of octave-forge, I
think) to do what you want.

Ooh, nifty! Why hadn't I even heard of this function? Probably because
I never needed it until now. :-)

$ mencoder mf://*.jpg -mf fps=20:type=jpg -ovc lavc -lavcopts
vcodec=mpeg4:vbitrate=5000 -o output.avi

Yes, I used something like this to create the movie, then ran it
through ffmpeg2theora to get a theora movie  (not optimal, I know, but
creating the theora movie from scratch is still complicated at this
stage).

My real question was about how to create an animated gif, though. Now
that the gif patents have expired, fewer issues with gif animations
than with all the codecs, and my movies are relatively simple.

About colormaps in octaviz, you can set different colormaps using
vtk_colormap.

Is there a way to use something like the competition's CDataMapping
here in order to have more direct control of the colouring instead of
it being always relative to the height of the current plot? I supppose
I can see where the highest and lowest points of my data are and
create a colourmap at each timestep suitable to this...

Thank you for your very helpful answers,
- Jordi G. H.


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