scmapdiff(f)

function df = scmapdiff(f)
%SCMAPDIFF Derivative of a Schwarz-Christoffel map.
%   SCMAPDIFF(F) returns a dummy object that represents the derivative
%   of the SC map F. The only thing possible with this object is to EVAL 
%   it.
%   
%   See also SCMAPDIFF/EVAL, SCMAPDIFF/SUBSREF.

%   Copyright 1998-2001 by Toby Driscoll.
%   $Id: scmapdiff.m 160 2001-07-20 14:28:22Z driscoll $

if nargin > 0
  df.themap = f;
else
  df.themap = [];
end
df = class(df,'scmapdiff');