function dydx = twoode(x,y)
%TWOODE  Evaluate the differential equations for TWOBVP.
%
%   See also TWOBC, TWOBVP.

%   Jacek Kierzenka and Lawrence F. Shampine
%   Copyright 1984-2000 The MathWorks, Inc. 
%   $Revision: 1.2 $  $Date: 2000/06/01 03:16:21 $

dydx = [    y(2)
         -abs(y(1)) ];


