/usr/share/octave/packages/fpl-1.3.4/deprecated/FPL2pdesurf.m is in octave-fpl 1.3.4-2.
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 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 | ## Copyright (C) 2004-2008,2009 Carlo de Falco, Massimiliano Culpo
##
## This file is part of
##
## FPL - Fem PLotting package for octave
##
## FPL 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 3 of the License, or
## (at your option) any later version.
##
## FPL 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.
##
## You should have received a copy of the GNU General Public License
## along with FPL; If not, see <http://www.gnu.org/licenses/>.
##
##
## AUTHORS:
## Carlo de Falco <cdf _AT_ users.sourceforge.net>
##
## Culpo Massimiliano
## Bergische Universitaet Wuppertal
## Fachbereich C - Mathematik und Naturwissenschaften
## Arbeitsgruppe fuer Angewandte MathematD-42119 Wuppertal Gaussstr. 20
## D-42119 Wuppertal, Germany
## -*- texinfo -*-
## @deftypefn {Function File} {} FPL2pdesurf (@var{mesh}, @
## @var{u} [ @var{property}, @var{value} ...])
##
## plots the scalar field @var{u}
## defined on the triangulation @var{mesh} using opendx.
##
## options (default value):
## @itemize @minus
## @item data_dep ("positions") defines wether data depends on
## positions or connections
## @item plot_field ("scalar") defines wether to plot the scalar field
## itself or its gradient
## @end itemize
##
## @seealso{MSH2Mgmsh, MSH2Mstructmesh}
## @end deftypefn
function FPL2pdesurf(varargin)
data_dep = "positions";
plot_field = "scalar";
if nargin == 1
FPL2showmesh(varargin{1});
elseif nargin == 2
mesh = varargin{1};
u = varargin{2};
elseif ( (nargin > 2) && (rem(nargin,2)==0) )
mesh = varargin{1};
u = varargin{2};
for ii=3:2:nargin
eval([ varargin{ii} " = """ varargin{ii+1} """;" ]);
endfor
else
keyboard ,error(["wrong number of parameters " num2str (nargin)])
endif
dataname = mktemp("/tmp",".dx");
scriptname = mktemp("/tmp",".net");
FPL2dxoutputdata(dataname,mesh.p,mesh.t,u,'u',0,1,1);
switch plot_field
case {"scalar","scal"}
showmesh = file_in_path(path,"FPL2coloredrubbersheet.net");
case {"gradient","grad"}
showmesh = file_in_path(path,"FPL2coloredgradient.net");
otherwise
error ([ "incorrect value " plot_field " for option plot_field "])
endswitch
system (["cp " showmesh " " scriptname]);
system (["sed -i \'s|__FILE__DX__|" dataname "|g\' " scriptname]);
switch data_dep
case {"positions","continuous","interpolate","P1"}
system (["sed -i \'s|__DATA_DEPENDENCY__|positions|g\' " scriptname]);
case {"connections","discontinuous","P0"}
system (["sed -i \'s|__DATA_DEPENDENCY__|positions|g\' " scriptname]);
otherwise
error ([ "incorrect value " data_dep " for option data_dep "])
endswitch
##command = ["dx -noConfirmedQuit -noImageRWNetFile -program " scriptname " -execute -image >& /dev/null & "];
command = ["dx -noConfirmedQuit -program " scriptname " -execute -image >& /dev/null & "];
system(command);
endfunction
function filename = mktemp (direct,ext);
if (~exist(direct,"dir"))
error("trying to save temporary file to non existing directory")
endif
done=false;
while ~done
filename = [direct,"/FPL.",num2str(floor(rand*1e7)),ext];
if ~exist(filename,"file")
done =true;
endif
endwhile
endfunction
%!shared msh
%!demo
%! msh.p = [0 0; 1 0; 1 1; 0 1].';
%! msh.t = [1 2 3 1; 1 3 4 1].';
%! msh.e = [1 2 0 0 1 0 1; 2 3 0 0 2 0 1; 3 4 0 0 3 0 1; 4 1 0 0 4 0 1].';
%! u = [0 1].';
%! FPL2pdesurf (msh, u, "data_dep", "connections");
%! s = input ("do you see a square divided into two triangles with a diagonal red-to-blue gradient color (if you see an empty plot try ctrl-F)? (y/n): " ,"s");
%! assert(s, "y")
%!demo
%! v = [0 0 1 1].';
%! FPL2pdesurf (msh, v);
%! s = input ("do you see a square divided into two triangles with a vertical red-to-blue gradient color (if you see an empty plot try ctrl-F)? (y/n): " ,"s");
|