/usr/share/doc/libplplot11/examples/octave/p14.m is in octave-plplot 5.9.9-2ubuntu2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 | ## Copyright (C) 1998-2003 Joao Cardoso.
##
## This program is free software; you can redistribute it and/or modify it
## under the terms of the GNU General Public License as published by the
## Free Software Foundation; either version 2 of the License, or (at your
## option) any later version.
##
## This program is distributed in the hope that it will be useful, but
## WITHOUT ANY WARRANTY; without even the implied warranty of
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
## General Public License for more details.
##
## This file is part of plplot_octave.
function p14(fg)
## And now, in the Theatre near you, "Octave, the movie"
global pl_automatic_replot
t = pl_automatic_replot;
pl_automatic_replot = 0;
if (!nargin)
plsetopt "db";
fig( free_fig); # unused plot window
title("Octave, the movie");
else
title("");
endif
ylabel "";
xlabel "";
l = 2;
x = y = linspace(-l, l, 30);
[xx,yy] = meshgrid(x,y);
r = yy .* exp(-(xx.^2 .+ yy.^2));
axis([-l l -l l min(min(r)) max(max(r))]);
colormap(bgr);
for k = linspace(0.01, 3.5*pi, 30)
meshc(x, y, sin(k).*r);
endfor
if(!nargin)
for k = linspace(0.01, 2*pi, 15)
surf(x, y, sin(k).*r);
endfor
shading "flat";
colormap (gray);
for k = linspace(0.01, 3*pi, 30)
surfl(x, y, sin(k).*r);
endfor
endif
axis; # reset axis to automatic mode
if (!nargin)
closefig; # the "db" option has negative side effects on other plots.
plsetopt "reset"; # reset options
endif
pl_automatic_replot = t;
endfunction
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