function val = get(a, prop_name)% GET get the value of given property% Copyright (C) 1999-2000 Antti Honkela, Harri Valpola,% and Xavier Giannakopoulos.%% This package comes with ABSOLUTELY NO WARRANTY; for details% see License.txt in the program package.  This is free software,% and you are welcome to redistribute it under certain conditions;% see License.txt for details.switch prop_name case 'E'  val = a.expection; case 'Var'  val = a.variance; otherwise  error('Bad property.')end