odemfile.m

很多matlab的源代码

function yp = odemfile(t,y)
% ODEMFILE Demonstration function file for DEMODE
% YP = ODEMFILE(T,Y) returns the state derivatives for a 2nd order system


% ADSP Toolbox: Version 2.0 
% For use with "Analog and Digital Signal Processing", 2nd Ed.
% Published by PWS Publishing Co.
%
% Ashok Ambardar, EE Dept. MTU, Houghton, MI 49931, USA
% http://www.ee.mtu/faculty/akambard.html
% e-mail: [e-mail]
% Copyright (c) 1998


if nargin==0,
 help odemfile,
 disp('This demo function file is used by various ode routines'),
 disp('Here is what it contains')
 disp('yp=[y(2); -3*y(1)-4*y(2)+exp(-t)];')
 return
end

yp=[y(2); -3*y(1)-4*y(2)+exp(-t)];