Question

matlab 画分段函数图

当-5=<X<=-0.3或0.3=<X<=5
-5=<Y<=-0.3或0.3=<Y<=5时
Z=X.^2+Y.^2
当-0.3<X<0.3
-0.3<Y<0.3时
Z=exp(X.*sin(Y))
如何画这个函数的等值线,谢谢帮忙了,我是matlab菜鸟

Answer 1

方法有点笨 哈，不过 是 为了解决 问题而编  的

程序 如下

[X,Y]=meshgrid(-.3:.01:.3,-.3:.01:.3);

Z=exp(X.*sin(Y));

mesh(X,Y,Z)

contour(X,Y,Z)

hold on

[X,Y]=meshgrid(-5:.01:-.3,-5:.01:-.3);

Z=X.^2+Y.^2;

mesh(X,Y,Z)

contour(X,Y,Z)

hold on

[X,Y]=meshgrid(0.3:.01:5,0.3:.01:5);

Z=X.^2+Y.^2;

mesh(X,Y,Z)

contour(X,Y,Z)

hold on

[X,Y]=meshgrid(-5:.01:-.3,0.3:.01:5);

Z=X.^2+Y.^2;

mesh(X,Y,Z)

contour(X,Y,Z)

hold on

[Y,X]=meshgrid(-5:.01:-.3,0.3:.01:5);

mesh(X,Y,X.^2+Y.^2)

contour(X,Y,X.^2+Y.^2)

Answer 2