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function y = ddefun(t,x,z)
xlag=z(:,1);
y=zeros(4,1);
%% Ä£ÐÍÐÎʽ
y(1)=50+1000.*x(2).*x(4)-0.000098.*x(3).*x(1)-0.011.*x(1);
y(2)=0.000098.*x(3).*x(1)-0.1.*x(2)-1200.*x(2).*x(4);
y(3)=200.*x(2)-0.67.*x(3);
y(4)=exp(-1).*0.05.*xlag(2).*xlag(4)-0.3.*x(4);


clc;clear all
tau=[1];
figure(1)£»
[t,yy]=ode23('ddefun1',tau,[0:0.01:100],[537.35;16.31;12.17;0.01]);
x=yy(:,1);
y=yy(:,2);
z=yy(:,3);
figure(1);
plot3(x,y,z);
xlabel('x(t)'),ylabel('y(t)'),zlabel('z(t)');
title('LorenzÎüÒý×Óͼ');
x=x(1001:end); %ÅׯúÇ°ÃæµÄһЩµã
%end

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2Â¥2015-11-29 00:52:13
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2Â¥: Originally posted by squllwu at 2015-11-29 00:52:13
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squllwu

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4Â¥2015-11-29 13:07:36
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5Â¥2015-11-29 13:12:36
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ÒýÓûØÌû:
5Â¥: Originally posted by ÒäÒä½­ÄÏ at 2015-11-29 13:12:36
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6Â¥2015-11-29 18:22:40
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