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Re: pcolor + contour

From: Puckja
Subject: Re: pcolor + contour
Date: Wed, 30 Jan 2008 10:15:17 -0800 (PST)

Puckja wrote:
> With 3.0, the following code seems to overlap contour on pcolor correctly:
> octave:> pcolor(z);shading flat; hold on
> octave:> contour(z);
> However, I have a real data set, but just cannot show the contour line
> with the following code:
> h1=pcolor(d1); shading flat; hold on;
> [c2,h2]=pcolor(eps,1); % with colormap(jet)
> where d1 is a 60x120 intensity map with magnitude ranging [0 5] and eps is
> same size map with bottom half being 1 and upper half being 2.3 (just like
> a half plane so I only need one contour to see the separation).
> I can not see the contour even by using 
> set(h2,"edgecolor","white");
> BUT, if I do [c3,h3]=contour(d1), then immediately both contour for d1 and
> eps show up. Then, I can set the edgecolor of h2 to whatever I want.
> This may be a workaround if I can delete the contour of d1 (h3).  I tried
> to delete(h3), but it didn't work either.  So I am stuck.
> Thanks for your help!!
> Puck

OK, I find the way to delete the h3 contour accidentally.  h3 is actually an
array so by doing delete(h3(1)) the unwanted contour of d1 is deleted and
leave the one I want.

It may be solve more gracefully by upgrade to new gnuplot, but if I don't
have time to try various gnuplot to find out yet.

Anyone has found out which version of gnuplot solves this issue?  



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