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annotate inst/BilinearForm.m @ 263:a61fc34334ca

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Use meshfunction to mark subdomains
author Eugenio Gianniti <eugenio.gianniti@mail.polimi.it>
date Thu, 07 Aug 2014 19:21:36 +0200
parents 0f302d70bb6d
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 ## Copyright (C) 2013 Marco Vassallo <gedeone-octave@users.sourceforge.net>
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2 ##
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3 ## This program is free software; you can redistribute it and/or modify it under
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4 ## the terms of the GNU General Public License as published by the Free Software
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5 ## Foundation; either version 3 of the License, or (at your option) any later
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6 ## version.
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7 ##
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8 ## This program is distributed in the hope that it will be useful, but WITHOUT
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9 ## ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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10 ## FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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11 ## details.
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12 ##
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13 ## You should have received a copy of the GNU General Public License along with
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14 ## this program; if not, see <http://www.gnu.org/licenses/>.
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15
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16 ## -*- texinfo -*-
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17 ## @deftypefn {Function File} {[@var{a}]} = @
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18 ## BilinearForm (@var{my_problem}, @var{U}, @var{V}, @var{coefficient_1}, @
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19 ## @var{coefficient_2},...)
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20 ##
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21 ## Construct a BilinearForm previously imported from ufl.
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22 ##
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23 ## The compulsory arguments are:
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24 ## @itemize @bullet
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25 ## @item @var{my_problem} the name of the problem to solve.
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26 ## @item the FunctionSpace @var{U} and @var{V} where the problem is defined.
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27 ## @end itemize
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28 ##
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29 ## The optional arguments are the @var{coefficient_1}, @var{coefficient_2}
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30 ## which specify the parameters for the BilinearForm as stated in the ufl file.
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31 ## They can be either a Constant, a Function or an Expression.
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32 ## You can also optionally provide a MeshFunction marking subdomains.
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33 ##
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34 ## @seealso{import_ufl_BilinearForm, import_ufl_Problem, FunctionSpace,
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35 ## LinearForm, ResidualForm, MeshFunction}
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36 ## @end deftypefn
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37 function a = BilinearForm (name, U, V, varargin)
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39 if nargin < 2
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40 error ("BilinearForm: wrong number of input parameters.");
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41 elseif ! ischar (name)
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42 error ("BilinearForm: first argument is not a valid string");
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43 endif
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44
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45 program = sprintf ("%s_BilinearForm(U, V", name);
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46 for k = 1:length (varargin)
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47 eval(['f_' num2str(k) '=varargin{k};']);
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48 program = strjoin ({ program, strcat('f_',num2str(k))}, ',');
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49 end
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50
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51 program = strjoin ({program, ');'});
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52 a = eval (program);
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54 endfunction