How to make a solid of revolution along the y-axis for a function with complex parts?
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Hi,
I'm trying to make a solid of revolution given the following function:
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/1508529/image.png)
The graph would look like the upper part of an oval with major axis lenght of 9.
What I'm trying to do is to generate a solid of revolution that revolves around the y-axis rather than the x-axis.
I've tested the following code to no avail:
X = 0:0.1:pi;
R = real((9 - (1/2).*((X - 7).^(1/2))).^(1/2));
[z,x,y] = cylinder(R);
surf(x,y,z)
As it can be seen, it generates (evidently) a cylinder, so I'm guessing my approach isn't the right one for this problem.
My final goal is to generate the upper and lower surface of torus-like object. Any idea on how to do this?
Thanks :)
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