[SciPy-User] Is Numpy rfft returning the correct number of points?

[Matthieu Brucher]

Hi,

Yes, it is correct. When doing a real FFT, you have 4096 points, but the
values 1:2048 are conjugated with 2049:4096, so you need only values 0:2049
to get your original signal back.

Matthieu

Matthieu

2011/2/16 Brendan Arnold <brendanarnold at gmail.com>

> Hi there,
>
> When I run numpy.fft.rfft on an array of length 4096, it returns an
> array of 2049 and not 2048. Is this right behaviour?
>
> I am using numpy 1.5.1
>
> Brendan
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