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Re: pcolor + contour

From: Puckja
Subject: Re: pcolor + contour
Date: Thu, 31 Jan 2008 13:19:53 -0800 (PST)


Could you please elaborate how to get Gnuplot CVS version a little bit more? 
I tried to get a version by the following commands (from
  cvs -d:pserver:address@hidden:/cvsroot/gnuplot
  cvs -z3 -d:pserver:address@hidden:/cvsroot/gnuplot
co -P gnuplot

But when I tried to compiled it (first of all there is no ./configure in the
directory), I got some error and cannot proceed:
Linux:/src/gnuplot# ./prepare
./prepare: 47: aclocal: not found

Some part of the preparation process failed.
Please refer to INSTALL for details.

How did I fix it?

Also, I have heard "mouse zooming" is possible with new gnuplot.  Is it
true?  I definitely would like to have this capability (not just scale the
image of the plot, but the axis scaled in as well.)



David Bateman wrote:
> Pukeja 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
> gnuplot doesn't do proper hidden line removal in this case, though there
> appears to be a patch applied to the CVS version to address this. So
> this is really a gnuplot issue and we can't do much about it in octave..
> Try the latest CVS version of gnuplot and see if that helps..
> D.
> -- 
> David Bateman                                address@hidden
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