How can I rotate a set of points around an axis?
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Hi everybody,
I have a question concerning a mathematical problem that I would like to solve.
If I have a Matrix 8x3, and like every line in the matrix describes a point, how can i rotate all the points in the matrix for example around the z axis?
I have tried it with a rotaionmatrix, but does that work? What does my code need to look like?
I'm sorry I don't really know how to do that. I have the following:
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/312608/image.png)
Above is the Code where I calculate the rotation matrix, and here is the set of points I would like to rotate:
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/312611/image.png)
Thanks a lot for your replies in advance, I'm glad for any help. I'm new to Matlab so I don't really know how to do this.
Have a nice evening,
Johnny
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James Tursa
2020-6-8
编辑:James Tursa
2020-6-8
Arrange your points as column vectors and do a matrix multiply. E.g.,
result = rotmxXYZ * K.';
The result will have your points as column vectors also.
If you really need them in rows, then transpose result, or do this:
result = K * rotmxXYZ';
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