Re: [OctDev] Plot3-problems under Windows

[David B. <Dav...@mo...>]

Patrich Rammelt wrote:

>Hi
>
>My problem is this:
>Plot3 does not work as expected. The example from the help text (help
>plot3) does not create a single line. Instead plot(x,y,z) creates 3+N
>lines (where x, y and z are vectors with N elements each). 
>
>More detailed description of what I see:
>One dimension on the plot is the sample-index (1..N), on the second
>dimension there is one value (1,2,3) for x,y and z and the third
>dimension shows the values of x,y and z itself. 
>There is one line connecting the values of x and one for y and one for
>z. Additionally there are N lines connecting x(i) with y(i) and z(i)
>for all i=1:N.
>
>I tried to reinstall octave-forge and gnuplot but that did not make
>any difference.  
>OS: Windows XP,  
>Octave 2.1.72,  
>gnuplot 4.0 patchlevel 0 (Cygwin). 
>  
>

With octave 2.9.5 I believe the code

    for i=1:columns(x)
      tmp = [x(:,i), y(:,i), z(:,i)];
      cmd =  ["__gnuplot_splot__ tmp ", fmt, ";\n"];
      eval (cmd);
    endfor

in __plt3__.m can be modified to

      sz = size(x,2);
      tmp = [([x; NaN*ones(1,sz)])(:), ([y; NaN*ones(1,sz)])(:), ([z;
NaN*ones(1,sz)])(:)];
      __gnuplot_splot__(tmp);

and this will probably help the issue. Though it doesn't do you much
good for 2.1.72..

Regards
David



>Under Linux everything is just fine.
>
>Any ideas? 
>Thanks, 
>Pat
>
>
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David Bateman                                Dav...@mo...
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