How do I change height and colour of cylinder made with SURF?

Question

Cheng Yoong 2011-5-27

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回答： Tomasz 2021-11-7

By default,we can use Matlab to plot a cylinder using surf command. This is what I've tried so far:

[x,y,z]=cylinder(10);
surf(x,y,z)

the result came out is a blue cylinder with radius 10. how do i change the colour and height in this case?

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Answer 1

Jan 2011-5-27

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[x,y,z] = cylinder(10);
z(2, :) = 10;
surf(x,y,z, 'FaceColor', [1,0,0]);

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Cheng Yoong 2011-5-27

Is it possible to plot the cylinder horizontally?

If possible can you show me how?

Jan 2011-5-27

@Cheng: You can try it by your self. "z(2, :)=10; disp(z); z(2, :)=3; disp(z)".

What about "surf(x,z,y)" or "surf(z,y,x)"?

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Answer 2

Walter Roberson 2011-5-27

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The simplest way to plot horizontally might be to change the viewpoint and relabel the axes :)

Otherwise you might need to create an hgtransform() that does a rotation and parent the surface to it using surf(x,y,z,'Parent',TheHGHandle)

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Answer 3

Patrick Kalita 2011-7-13

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在 MATLAB Online 中打开

Here's how you would do it with an hgtransform and makehgtform:

% Make the hgtransform and the surface; parent the surface to the hgtransform
[x,y,z] = cylinder(10);
h = hgtransform;
surf(x,y,z, 'Parent', h, 'FaceColor', 'r');
view(3)
% Make it taller
set(h, 'Matrix', makehgtform('scale', [1 1 10]))
% Tip it over and make it taller
set(h, 'Matrix', makehgtform('xrotate', pi/2, 'scale', [1 1 10]))