跪求matlab可视化。。。。。。急求。。。。。。

显示全部楼层 · 2011-6-25 04:46:29

function y=funt(t,y)
y=(y^2-t-2)/4/(t+1);
t0=0;tf=10;
y0=2;
[t,y]=ode23('funt',[t0,tf],y0);
y1=sqr(t+1)+1;
plot(t,y,'b.',t,y1,'r-');
怎么利用这个求的微分方程通过一个空间按钮输出，并通过一个动态编辑框调用由用户给定方程。。。。。。。。。

千问 · 2011-6-25 04:46:29

>> A=[3,0.62,0.073,0.71; 0.62,3,0.057,5.512; 0.073,0.057,3,0.065; 0.71,5.512,0.065,3] ;>> [Q,d]=eig(A) Q =
0.0117
0.9363 -0.3105
0.1638
0.7063 -0.1137
0.0513
0.6968
0.0009 -0.3175 -0.9481
0.0171 -0.7078 -0.0984
0.0449
0.6981d = -2.5127
0 ...