matlab求教.z=[0:1:2],x=[0:0.5:3],在x《1时y=x+z；1

clear all;
clc;
z=0:1:2;x=0:0.5:3;
[X,Z]=meshgrid(x,z);
[m,n]=size(X);
Y=zeros(m,n);
for i=1:m
    for j=1:n
        if X(i,j)<=1
            Y(i,j)=X(i,j)+Z(i,j);
        end
        if X(i,j)>1&&X(i,j)<=2
            Y(i,j)=1+Z(i,j);
        end
        if X(i,j)>2&&X(i,j)<=3
            Y(i,j)=X(i,j)+Z(i,j)-1;
        end
    end
end
surf(X,Z,Y);
结果：