How can I calculate the FFT of a quaternion vector in MATLAB?

I have an image or a data set represented in quaternion form and I would like a function to compute the FFT of my data.

Answer 1

[MathWorks Support Team]

The ability to directly calculate the FFT of quaternions is not available in MATLAB.

There is, however, the FFTN function for multidimensional FFTs which may be helpful in calculating the FFT of a quaternion. For more information on this function, type the following command at the MATLAB prompt:

doc fftn