## Copyright (C) 2013 Marco Vassallo

## 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.

## You should have received a copy of the GNU General Public License along with
## this program; if not, see <http://www.gnu.org/licenses/>.


## -*- texinfo -*-
## @deftypefn {Function File} {} = fem_ffc (myproblem.ufl)
## This function take as input the name of the .ufl file where 
## the Variational Problem is defined.
## @example
## 
## @end example
## @seealso{} 
## @end deftypefn

function c = Constant (name, x)

  if nargin != 2
    error ("Constant: wrong number of input parameters.");
  elseif ! ischar (name)
    error ("Constant: second argument is not a valid string");
  elseif ! isvector (x)
    error ("Constant: second argument is not a valid string");
  endif

  c = Expression (name, @(x, y) x);

endfunction