aspcore.fouriertransform.get_real_freqs

aspcore.fouriertransform.get_real_freqs(num_freq: int, samplerate: int)

Returns the real sampled frequencies in Hz for a discrete Fourier transform

Parameters:

• num_freq (int) – should equal the length of the sequence, so it includes the number of negative frequencies

• samplerate (int)

Returns:

freqs – if num_freq is even, num_real_freq = num_freq // 2 + 1 if num_freq is odd, num_real_freq = (num_freq + 1) // 2

Return type:

ndarray of shape (num_real_freq,)