Re: Plotting problem

[Etienne Grossmann]

  Oops, I thought 2D was ok. For 3D, I don't know well what gnuplot
offers. I'd personally go w/ vrml (on octave-forge, though).

  Good luck,

  Etienne

On Tue, May 02, 2006 at 09:54:44PM +0200, Matthias Brennwald wrote:
# Thanks, I believe that might indeed help. Your example works well in  
# 2-D. However, I want this to be a 3-D plot, so I'll have to use the  
# 'mesh' command, I believe. But that still gives transparent polygons...
# 
# Cheers,
# Matthias
# 
# 
# On 02.05.2006, at 16:39, Etienne Grossmann wrote:
# 
# >
# >   Hi Matthias,
# >
# > shing like
# >
# >   xx = linspace (-7,7,100);
# >   y1 = sin (xx); y2 = 0.8*sin(xx+pi/6); y3 = 0.64*sin(xx+pi/3);
# >   __gnuplot_raw__ ("set style data filledcurves y1=0;\n")
# >   plot (xx,y1,xx,y2,xx,y3)
# >
# > ?
# >
# >   Hth,
# >
# >   Etienne
# >
# > On Tue, May 02, 2006 at 03:25:33PM +0200, Matthias Brennwald wrote:
# > # Dear all,
# > #
# > # before reading further, a short warning: I'm a newbie (both with
# > # Octave and with this list), so...
# > #
# > # I am trying to write some code that plots a "waterfall  
# > diagram" (aka.
# > # "cumulative spectral decay diagram", CSD diagram). An example of  
# > such
# > # plot is available here: http://www.euronet.nl/users/temagm/audio/
# > # waterfall_focal.htm
# > #
# > # I want this code to work both under Matlab and Octave. I use Octave
# > # 2.1.72 on the Mac, but the code should not be limited to this
# > # specific setup.
# > #
# > # My approach to plotting the waterfall is this (see also example code
# > # below): first, plot the curve in the back as a filled polygon. Then,
# > # plot the next curve also as filled polygon above the one in the  
# > back;
# > # and continue in the same way until the frontmost curve. With Matlab,
# > # I can use 'fill3' easily plot these polygons. With plain vanilla
# > # Octave, the only options I have is 'mesh' or '__gnuplot_splot__',
# > # which I cannot make plot FILLED polygons. (I also tried the 'fill3'
# > # command from Octave-forge, but with no luck. Also, I want my code to
# > # be independent of Octave-forge, because Octave-forge is not  
# > available
# > # as a 'stable' version from Fink for easy installation on the Mac.)
# > #
# > # Any help or ideas?
# > #
# > # Matthias
# > #
# > #
# > #
# > #
# > # An example illustrating my approach (and problem) is this:
# > #
# > # **********************
# > # % First, make up three curves z(x) to play with. Each of the curves
# > # have constant y (y=1,2,3):
# > # x = [0:100];
# > # y = [ 0:2 ];
# > # z = [   2+sin(x/10);
# > #          1.8 + 0.8*sin(x/11);
# > #          1.5 + 0.6*sin(x/12); ];
# > #
# > # % append some points so we get closed curves:
# > # x = [ x x(end) x(1) x(1) ];
# > # z = [ z [0 0 0]' [0 0 0]' z(:,1) ];
# > #
# > # for n=1:3
# > #      if exist('OCTAVE_VERSION') % we're running Octave
# > #          mesh(x,y(n),z(n,:)); % this plot TRANSPARENT polygons
# > #      else % we're running Matlab
# > #          poly=fill3(x,repmat(y(n),1,length(z(n,:))),z(n,:),'w'); %
# > # this plots a filled polygon with fill color 'white'
# > #          set(poly,'EdgeColor','r'); % this sets the edge of the
# > # polygon to 'red'
# > #      end
# > #      hold on
# > # end
# > #
# > # hold off
# > # **********************
# > #
# > #
# > #
# > #
# > # -------
# > # Matthias Brennwald
# > # Lägernstrasse 6
# > # CH 8037 Zürich
# > # +41 (0)44 364 17 03
# > # address@hidden
# > #
# > #
# > #
# > # _______________________________________________
# > # Help-octave mailing list
# > # address@hidden
# > # https://www.cae.wisc.edu/mailman/listinfo/help-octave
# >
# > -- 
# > Etienne Grossmann ------ http://www.cs.uky.edu/~etienne
# 
# 
# 
# -------
# Matthias Brennwald
# Lägernstrasse 6
# CH 8037 Zürich
# +41 (0)44 364 17 03
# address@hidden
# 
# 
# 
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-- 
Etienne Grossmann ------ http://www.cs.uky.edu/~etienne