def stationarity_autocorrelation_test_original(data):
"""
Tests stationarity and autocorrelation of time series
"""
print('The purpose of this test is to determine the stationarity and '
'autocorrelation\n of the original time series.')
test_stationarity(data['count'], window=12, title="Original Time series")
p.acf_pacf(data)
def stationarity_test_seasonal_diff(data):
"""
Tests stationarity and autocorrelation of seasonal difference
"""
print('The purpose of this test is to determine the stationarity and '
'autocorrelation\n of the seasonal difference.')
season = f.seasonal_difference(data)
test_stationarity(season['count'], window=12, title="Seasonal Difference")
p.acf_pacf(season)
def stationarity_autocorrelation_test_first_diff(data):
"""
Tests stationarity and autocorrelation of first difference
"""
print('The purpose of this test is to determine the stationarity and '
'autocorrelation\n of the first difference.')
first_diff = f.order_difference(data)
test_stationarity(first_diff['count'],
window=12,
title="First Order Difference")
p.acf_pacf(first_diff)
def stationarity_test_seasonal_first_diff(data):
"""
Tests stationarity and autocorrelation of first difference and first
seasonal difference
"""
print('The purpose of this test is to determine the stationarity and '
'autocorrelation\n of the seasonal difference of the first '
'difference.')
first_diff = f.order_difference(data)
season_first = f.order_difference(first_diff)
test_stationarity(season_first['count'],
window=12,
title="Seasonal Difference of First Order Difference")
p.acf_pacf(season_first)