PyNAFF

Authors:

• Foteini Asvesta (fasvesta .at. cern .dot. ch)
• Nikos Karastathis (nkarast .at. cern .dot. ch)
• Panagiotis Zisopoulos (pzisopou .at. cern .dot. ch)

A Python module that implements the Numerical Analysis of Fundamental Frequencies method of J. Laskar. The code works either as a script (as the original code of Lashkar) or loaded as a module in Python/Julia code or jupyter-like notebooks (i.e. SWAN).

Example of Usage

import PyNAFF as pnf
import numpy as np

t = np.linspace(1, 3000, num=3000, endpoint=True)
Q = 0.12345
signal = np.sin(2.0*np.pi*Q*t)
pnf.naff(signal, 500, 1, 0 , False, window=1)
# outputs an array of arrays for each frequency. Each sub-array includes:
# [order of harmonic, frequency, Amplitude, Re{Amplitude}, Im{Amplitude]


# My frequency is simply 
pnf.naff(signal, 500, 1, 0 , False)[0][1]

-- nkarast