Returns the signature (info on inputs, outputs) of a function, or a method/property of an object. This is helful when doing object-oriented programming, as it seems that Matlab has no default functionality for doing this in OOP.
sig handle.fi % returns info on all methods of handle class starting
% with fi.
x=sym('x'); % Create a symbolic object (from symbolic math toolbox)
sig x.ez % Get info on all methods starting with "ez"
sig x % Return the (large) list of all properties and methods
% associated with the "sym" class.