--- /dev/null
+## Copyright (C) 2004-2008 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 2 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} {} FPL2dxappenddata ( @var{filename},
+## @var{p}, @var{t}, @var{u}, @var{attr_name}, @var{attr_rank},
+## @var{attr_shape}, @var{endflie} )
+##
+## Apends data to a file in DX form.
+## Only one variable can be written to the file
+## variable must be a scalar, vector or tensor of doubles
+## mesh data in the file must be consistent with this variable
+##
+## Variable must be a scalar, vector or tensor of doubles
+##
+## @itemize @minus
+## @item @var{filename}= name of file to save (type string)
+## @item @var{p}, @var{t} = mesh
+## @item @var{u} = variable to save
+## @item @var{attr_name} = name of the variable (type string)
+## @item @var{attr_rank} = rank of variable data (0 for scalar, 1 for vector, etc.)
+## @item @var{attr_shape} = number of components of variable data (assumed 1 for scalar)
+## @item @var{endfile} = 0 if you want to add other variables to the
+## same file, 1 otherwise
+## @end itemize
+## @end deftypefn
+
+function FPL2dxappenddata(filename,p,t,u,attr_name,attr_rank,attr_shape,endfile)
+
+ p = p';
+ t = t';
+ t = t(:,1:3);
+
+ fid=fopen (filename,'a');
+ Nnodi = size(p,1);
+ Ntriangoli = size(t,1);
+
+ fprintf(fid,'\nattribute "element type" string "triangles"\nattribute "ref" string "positions"\n\n');
+
+ if ((attr_rank==0) & (min(size(u))==1))
+ fprintf(fid,'object "%s.data"\nclass array type double rank 0 items %d data follows',attr_name,Nnodi);
+ fprintf(fid,'\n %1.7e',u);
+ else
+ fprintf(fid,'object "%s.data"\nclass array type double rank %d shape %d items %d data follows', ...
+ attr_name,attr_rank,attr_shape,Nnodi);
+ for i=1:Nnodi
+ fprintf(fid,'\n');
+ fprintf(fid,' %1.7e',u(i,:));
+ endfor
+ endif
+ fprintf(fid,['\nattribute "dep" string "positions"\n\n' ...
+ 'object "%s" class field\n'...
+ 'component "positions" value "pos"\n'...
+ 'component "connections" value "con"\n'...
+ 'component "data" value "%s.data"\n'],...
+ attr_name,attr_name);
+
+ if(endfile)
+ fprintf(fid,'\nend\n');
+ endif
+
+ fclose (fid);
+
+endfunction
\ No newline at end of file