[MATLAB图像处理] 关于二维图像的初级问题紧急！ - MATLAB爱好者论坛-LabFans.com

hux07 · 2009-09-13, 21:56

均匀带电圆盘的电力线图使用streamline
命令，画不出电力线，请问各位高手问题在哪里？？
对各种提示均表示感谢！

r=0.75;
[X,Y]=meshgrid(0:0.1:1);
p=sqrt(X.^2+Y.^2);
E1=0.5.*(1-p./(p.^2+r.^2).^0.5)-3./8.*X.^2./p.^2.*(2/3-2.*p./(p.^2+r.^2).^0.5+7.*p.^3/3./(p.^2+r.^2).^1.5-p.^5./(p.^2+r.^2).^2.5);
E2=3/8*2.*Y.*X./p.^2.*(2/3-p./(p.^2+r.^2).^0.5+p.^3/3./(p.^2+r.^2).^1.5);
Ex=E1.*X./(p+eps*(p==0))+E2.*Y./(p+eps*(p==0));
Ey=E1.*Y./(p+eps*(p==0))-E2.*X./(p+eps*(p==0));
Sx=(0:0.03:0.75);Sy=[0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0];
streamline(X,Y,Ex,Ey,Sx,Sy)

2009-09-13, 21:56	#1
hux07 初级会员注册日期: 2009-09-13 帖子: 1 声望力: 0	关于二维图像的初级问题紧急！均匀带电圆盘的电力线图使用streamline 命令，画不出电力线，请问各位高手问题在哪里？？对各种提示均表示感谢！ r=0.75; [X,Y]=meshgrid(0:0.1:1); p=sqrt(X.^2+Y.^2); E1=0.5.(1-p./(p.^2+r.^2).^0.5)-3./8.X.^2./p.^2.(2/3-2.p./(p.^2+r.^2).^0.5+7.p.^3/3./(p.^2+r.^2).^1.5-p.^5./(p.^2+r.^2).^2.5); E2=3/82.Y.X./p.^2.(2/3-p./(p.^2+r.^2).^0.5+p.^3/3./(p.^2+r.^2).^1.5); Ex=E1.X./(p+eps(p==0))+E2.Y./(p+eps(p==0)); Ey=E1.Y./(p+eps(p==0))-E2.X./(p+eps*(p==0)); Sx=(0:0.03:0.75);Sy=[0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0]; streamline(X,Y,Ex,Ey,Sx,Sy)