MATLAB: How to rotate a plot of N number of 2D points

dataMATLABplotpointsrotate

How can I rotate a plot of N number of 2D points?

Best Answer

There are two ways to accomplish the rotation, as mentioned below:
1. If you only want to rotate the plot by say "theta" degrees, then you can use the "camroll" function after you have plotted the data as follows:
      camroll(theta);
The documentation is linked below if you would like more details about this function:
https://www.mathworks.com/help/matlab/ref/camroll.html
2. The second approach is to rotate the data using the concept of rotation matrices before plotting the data. Refer to the following Wiki link for details about rotation matrices:
https://en.wikipedia.org/wiki/Rotation_matrix
You can define your rotation matrix based on the first equation on the above wiki page as:
R = [cos(theta) -sin(theta); sin(theta) cos(theta)];
Note that "theta" in this case is in radians and not degrees. Then you can rotate your data as follows:
dataRot = R * data; % data is of the size (2 x N) in this case
Once you have the rotated data, you plot the data with the "plot" command as usual.
Related Question