Is there a documentation error in the FFT function in MATLAB 7.11 (R2010b)?

In the documentation of FFT in MATLAB 7.11 (R2010b), the nth root of unity is missing the negative sign in the exponential.

Answer 1

[MathWorks Support Team]

This is an error within the documentation in MATLAB for the function FFT. The documentation should read as follows:

w_n = exp(-2*pi*i/N);

The negative sign is missing from the exponential.