如何实现两个变量区间的分段函数呢。

x=-2:0.01:2;

x=x+(x==0)*eps;

y=-2:0.01:2;

%y=y+(y==0)*eps;

[X,Y]=meshgrid(x,y);

m=1;

for xx=x，yy=Y

if(xx<=2&xx>0&&yy<=2&yy>0)

B=Y./X;

elseif(xx>=-2&xx<0&&yy<=2&yy>0)

B=Y./X+pi/2;

elseif(xx>=-2&xx<0&&yy>=-2&yy<0)

B=Y./X+pi;

else

B=Y./X+3*pi/2;

end

Z=m.*atan(B);

figure(1);

meshc(x,y,Z);

比如上边程序，红色字应该怎么改呢，如果没法改应该怎么正确写呢，求大佬解答

Answer 1

[kibang]

参考代码：

clear;clc

dt = 0.01;
m = 1;
for a = 1:4
    if a == 1
        x = 0:dt:2; y = 0:dt:2;
    elseif a == 2
        x = -2:dt:0; y = 0:dt:2; 
    elseif a == 3
        x = -2:dt:0; y = -2:dt:0;
    elseif a == 4
        x = 0:dt:2; y = -2:dt:0;
    end
    
    [X,Y] = meshgrid(x,y);
    
    if a == 1
        B = Y./X;
    elseif a == 2
        B=Y./X+pi/2;
    elseif a == 3
        B=Y./X+pi;
    elseif a == 4
        B=Y./X+3*pi/2;
    end
    Z = m.*atan(B);
    meshc(X,Y,Z)
    hold on
end