From help-request at octave dot org Tue Jan  4 11:07:18 2005
Subject: Re: Plotting many images on one figure
From: Jonathan Stickel <jjstickel at sbcglobal dot net>
To: help at octave dot org
Date: Tue, 04 Jan 2005 09:09:01 -0800

Once, you have the saved image files, you could use the "montage" 
command of ImageMagick.  Probably not exactly what you want since it 
requires work external to Octave, but I think it will give the desired 
result.

Jonathan


Daniel Déchelotte wrote:
> Hi,
> 
> I would like to draw, say, a 10 by 10 grid of images, each of which is a 28
> by 28 pixel, gray-level image. I couldn't get imshow() or image() to
> display anything, I could only get saveimage generate a ppm image (PS seems
> broken), and I can not see how I could arrange several of these images into
> one figure.
> 
> Below:
>  "siz" is 28
>  "everything" is a [N, siz * siz] array (N = 100)
> The following statement writes the first image in a ppm file:
>  saveimage("test.ppm", reshape(everything(1,:), siz, siz)',...
>            "ppm", colormap(gray(256)))
> 
> A Matlab(r) script I would like to port to octave:
> nlines = 10;
> ncolumns = 10;
> for i=1:nlines * ncolumns,
>   subplot(nlines, ncolumns, i);
>   colormap(gray(256));
>   image(reshape(everything(i,:), siz, siz)');
> end
> 
> I am afraid I already know the answer (not possible), but I wouldn't like
> to miss a solution if one exists. I am running octave2.0.17-8 but could be
> using octave2.1.60-1 if that helps, on Linux (Debian sarge).
> 
> Regards,



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