www.gusucode.com > 马尔科夫决策过程包括一些例程源码程序 > assert.m

    function assert(pred, str)
% ASSERT Raise an error if the predicate is not true.
% assert(pred, string)

if nargin<2, str = ''; end

if ~pred
  s = sprintf('assertion violated: %s', str);
  error(s);
end