How to plot the surface of the parabolic cylinder $y^2=8x$ in the first octant bounded by the planes $y=4$ and $z=6$?

How to plot the surface of the parabolic cylinder in the first octant bounded by the planes y=4 and z=6?

Y = linspace(0,4,100);
Z=linspace(0,6,100);
surf(Y.^2/8,Y,Z);

I have parametrized the cylinder as , . But unable to plot the desired surface.

Please help to generate the surface

[Torsten]

If you had read the documentation for "surf", you would have noticed that it's necessary to use "meshgrid" for the ranges of X and Y in order to plot Z:

https://de.mathworks.com/help/matlab/ref/surf.html

[Atom]

Is it like this?

[X,Y] = meshgrid(0:.5:6);
Y = linspace(0,4,100);
Z=linspace(0,6,100);
surf(Y.^2/8,Y,Z);

Answer 1

[KSSV]

y = linspace(0,4) ; 
z = linspace(0,6) ;
[Y,Z] = meshgrid(y,z) ; 
X = Y.^2/8 ; 
surf(X,Y,Z)