zy20.m

电路与系统专业的matlab程序。有很多经典的实例。

% 三维绘图和屏幕控制

clf ,clear
disp('三维曲线'),echo on 

pause, z=0:0.1:4*pi;x=cos(z);y=sin(z);plot3(x,y,z);
pause,shg
pause,title('三维曲线'),xlabel('x=sin(z)'),ylabel('y=cos(z)'),zlabel('z= t');
disp('二维图形在三维空间的排列'),

pause, x=-8:0.5:8;y=x';
pause,X=ones(size(y))*x;
Y=y*ones(size(x)); 
pause,subplot(1,2,1),plot(X,Y),
pause,subplot(1,2,2),plot(Y,X),
pause,subplot(1,1,1), R=sqrt(X.^2+Y.*Y); z=sin(R)./R; mesh(z)
pause,R=sqrt(X.^2+Y.*Y)+eps; z=sin(R)./R; figure(1),mesh(z)    %二范数

pause,R=abs(X)+abs(Y)+eps; z1=sin(R)./R; figure(2),mesh(z1)    %一范数
pause,text(10,30,1.1,'R=abs(X)+abs(Y),z=sin(R)./R'),view(20,0),

pause,disp('屏幕分割')
pause,disp('坐标设定,外观变换')
pause,subplot(2,2,1),R=sqrt(X.^2+Y.*Y); z=sin(R)./R; meshc(z)
pause,title('meshc(z),shading flat'),shading flat
pause,subplot(2,2,2), R=sqrt(X.^2+Y.*Y)+eps; z=sin(R)./R;meshz(z)
pause,title('meshz(z),shading interp'),shading interp
pause,subplot(2,2,3), R=abs(X)+abs(Y)+eps; z1=sin(R)./R; surfc(z1)
pause,title('surfc(z1),shading flat'),shading flat,
pause,subplot(2,2,4); surfl(z1),view(20,0)
pause,title('surfl(z1),view(20,0)')