Re: pcolor in octave 3.0 requires same dimension

[Dukeja]

Thanks both of your help.  It works now!

I am also very pleased that Octave 3.0 has the command line history recall
just like Matlab.  It is GREAT!

Much thanks for this significant upgrade!:clap:

Puck

Søren Hauberg wrote:
> 
> tor, 27 12 2007 kl. 10:51 -0600, skrev Puck Ja:
>> I just upgraded to octave 3.0 and was so glad to find "pcolor" is
>> available without any addon, such as octplot.  My main usage is to
>> display a 2D matrix. However, one thing strange to me is that pcolor
>> requires equal dimension (x=y) to work.  
>> octave:6> pcolor(mat)
>> error: surface: x, y, and z must have same dimensions
>> error: evaluating if command near line 95, column 7
>> error: evaluating if command near line 87, column 5
>> error: evaluating if command near line 76, column 3 
>> error: called from `surface:__surface__' in file
>> `/usr/local/share/octave/3.0.0/m/plot/surface.m'
>> error: called from `surface' in file
>> `/usr/local/share/octave/3.0.0/m/plot/surface.m'
>> error: evaluating assignment expression near line 48, column 7 
>> error: called from `pcolor' in file
>> `/usr/local/share/octave/3.0.0/m/plot/pcolor.m'
>> 
>> Why is that limitation.  Certain I can work around it by making a
>> larger square matrix and then using axis([x1 x2 y1 y2]) to make it
>> display what I look for, but that is way to silly.  Is there any other
>> way to work around it? 
> It's just a small bug in pcolor. The attached patch fixes it.
> 
> Søren
> 
> Index: scripts/plot/pcolor.m
> ===================================================================
> RCS file: /cvs/octave/scripts/plot/pcolor.m,v
> retrieving revision 1.4
> diff -u -r1.4 pcolor.m
> --- scripts/plot/pcolor.m     10 Dec 2007 06:52:51 -0000      1.4
> +++ scripts/plot/pcolor.m     27 Dec 2007 18:03:49 -0000
> @@ -38,7 +38,7 @@
>      c = x;
>      z = zeros (size (c));
>      [nr, nc] = size (c);
> -    [x, y] = meshgrid (1:nr, 1:nc);
> +    [x, y] = meshgrid (1:nc, 1:nr);
>    elseif (nargin == 3)
>      z = zeros (size (c));
>    else
> 
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