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

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Atom 2022-7-10

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https://ww2.mathworks.cn/matlabcentral/answers/1756730-how-to-plot-the-surface-of-the-parabolic-cylinder-y-2-8x-in-the-first-octant-bounded-by-the-planes

回答： KSSV 2022-7-10

采纳的回答： KSSV

在 MATLAB Online 中打开

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

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Torsten 2022-7-10

编辑：Torsten 2022-7-10

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 2022-7-10

编辑：Atom 2022-7-10

在 MATLAB Online 中打开

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);

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Answer 1

KSSV 2022-7-10

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链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1756730-how-to-plot-the-surface-of-the-parabolic-cylinder-y-2-8x-in-the-first-octant-bounded-by-the-planes#answer_1003970

在 MATLAB Online 中打开

y = linspace(0,4) ;

z = linspace(0,6) ;

[Y,Z] = meshgrid(y,z) ;

X = Y.^2/8 ;

surf(X,Y,Z)

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

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