Can I see the code for a Matlab Function?

How do I see the code for a Matlab function? For example, ordfilt2 isn't working the way I think it should after reading its documentation, and I would like to see the code for how this function is implemented. Thank you.

Answer 1

[Walter Roberson]

function_name = 'ordfilt2';

location = which(function_name);
if isempty(location)
    error('could not find function "%s" at all', function_name)
elseif strncmp(location, 'built-in ', 9)
    error('function "%s" exists but is a built-in and cannot be viewed', function_name);
else
    edit(location)
end