% LOADVAR   Loads a specific varaible from a file
%
%    The function enables direct loading of a named variable (matlab's load
%    function puts into a struct). To load the variable x from file data.mat:
%
%        x = loadvar( 'data.mat', 'x' )
%
% FORMAT   x = loadvar( filename, varname )
%        
% OUT   x          Loaded variable
% IN    filename   Name of file.
%       varname    Name of variable.

% 2008-10-27   Created by Patrick Eriksson.


function x = loadvar( filename, varname )
  
X = load( filename, varname );

if ~isfield( X, varname )
  error( 'The file does not contain the requested variable.' );
else
  x = getfield( X, varname );
end