请教高手一个S函数（matlab内含）！！
谁能帮我注释一下这个S函数呢function =pndanim1(t,x,u,flag,ts);
%PNDANIM3 S-function for animating the motion of a pendulum.
% Ned Gulley, 6-21-93
% Copyright 1990-2002 The MathWorks, Inc.
% $Revision: 5.10 $
global PendAnim1
if flag==2,
if any(get(0,'Children')==PendAnim1),
if strcmp(get(PendAnim1,'Name'),'simppend Animation'),
set(0,'currentfigure',PendAnim1);
hndlList=get(gca,'UserData');
x=;
y=;
set(hndlList(1),'XData',x,'YData',y);
set(hndlList(2),'XData',u(1),'YData',0);
drawnow;
end
end
sys=[];
elseif flag == 4 % Return next sample hit
% ns stores the number of samples
ns = t/ts;
% This is the time of the next sample hit.
sys = (1 + floor(ns + 1e-13*(1+ns)))*ts;
elseif flag==0,
% Initialize the figure for use with this simulation
animinit('simppend Animation');
= figflag('simppend Animation');
axis([-3 3 -2 2]);
hold on;
x=;
y=;
hndlList(1)=plot(x,y,'LineWidth',5,'EraseMode','background');
hndlList(2)=plot(0,0,'.','MarkerSize',25,'EraseMode','back');
set(gca,'DataAspectRatio',);
set(gca,'UserData',hndlList);
sys=;
x0=[];
end
请教高手
:@Q我查看了一些书，上面说这是比较老的S函数格式，看了半天我也没有读懂~~~:@Q[ 本帖最后由 pb0322 于11:13 PM 编辑 ]
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