Calculates discrete fourier transform. re should contain the real
part of the data and im the imaginary part of the data. The method
operates in place - the result is saved back to re and im.
Both arrays must be properly aligned - to obtain a properly aligned array you can
use allocate.
Calculates discrete fourier transform. re should contain the real part of the data and im the imaginary part of the data. The method operates in place - the result is saved back to re and im. Both arrays must be properly aligned - to obtain a properly aligned array you can use allocate.