MATLAB: How to plot multiple 3d on one graph

3d plotsplot3

I've try hold on but that isn't work. It turns out to be 2d plot
interval = [-5:0.1:5];
x = -5:0.1:5;
y = -5:0.1:5; 
[X,Y] = meshgrid(x,y);
z1 = acos((cos(interval)+cos((interval).')));
z2 = acos(-(cos(interval)+cos((interval).')));
figure(1);
plot3(X,Y,z2)
figure(2);
plot3(X,Y,z1)

Best Answer

Following code works fine
interval = [-5:0.1:5];
x = -5:0.1:5;
y = -5:0.1:5; 
[X,Y] = meshgrid(x,y);
z1 = acos((cos(interval)+cos((interval).')));
z2 = acos(-(cos(interval)+cos((interval).')));
figure(1);
plot3(X,Y,z2)
hold on
plot3(X,Y,z1)
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