Rotating 3D cloud matrix data

Hi,

I have a 3D cloud point matrix (x,y,z) (39600x3) and I am trying to rotate all the points by a few degrees clockwise. I have been attempting to use 'makeghtform' however I keep getting errors and I have been doing trial and error to try and work out how to complete this task however I seem to be failing. Can anyone please help me?

Thanks

[Jan]

Post the code and a copy of the error message.

Answer 1

[Star Strider]

The rotate function could be an option.

Answer 2

[Jan]

Multiplacte the data with a rotation matrix, e.g. obtained by: https://www.mathworks.com/matlabcentral/fileexchange/66446-rotation-matrix

R             = RotMatrix(alpha, axisOfRotation);
RotatedPoints = R * Points;

Or without this function:

% Normalized vector:
u = u(:);
u = u ./ sqrt(u.' * u);
    
% 3D rotation matrix:
x  = u(1);
y  = u(2);
z  = u(3);
mc = 1 - c;
R  = [c + x * x * mc,      x * y * mc - z * s,   x * z * mc + y * s; ...
      x * y * mc + z * s,  c + y * y * mc,       y * z * mc - x * s; ...
      x * z * mc - y * s,  y * z * mc + x * s,   c + z * z .* mc];