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I am totally beginner in Python and after using seasonal_decompose for time series decomposition result=seasonal_decompose(series, model='additive', freq=365) I got plotted results with commands result.plot() and pyplot.show(), but I cannot understand how to print this results values on screen or how to see decomposed time series values? I have plot, but I need to have values in console or some data file.

Complete code:

from pandas import read_csv
series=read_csv('B.csv', header=0, parse_dates=[0], index_col=0, squeeze=True)
from random import randrange
from matplotlib import pyplot
from statsmodels.tsa.seasonal import seasonal_decompose
result=seasonal_decompose(series, model='additive', freq=365)
result.plot()
pyplot.show()
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1 Answer 1

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seasonal_decompose returns an 'object with seasonal, trend, and resid attributes.' We can access the data by calling the object:

res = seasonal_decompose(series, model='additive', freq=365)
residual = res.resid
seasonal = res.seasonal 
trend = res.trend
print trend

etc...

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  • $\begingroup$ Seasonal and trend works for me, but with residual = res.residual I got answer Attribute Error: 'DecomposeResult' object has no attribute 'residual' $\endgroup$
    – nick_name
    Commented Jul 26, 2017 at 16:24
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    $\begingroup$ Try res.resid (inconsistent API) $\endgroup$
    – Emre
    Commented Jul 26, 2017 at 16:40
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    $\begingroup$ My bad, as it is in the docs, res.resid should work. Thanks @Emre. statsmodels.org/dev/generated/… $\endgroup$
    – Hobbes
    Commented Jul 26, 2017 at 16:42
  • $\begingroup$ It works now. But I have some other problem, I got NaN values for trend and resid. Besides that, on plot I got some real values for trend and residuals, I can't understand what is different here in console output? $\endgroup$
    – nick_name
    Commented Jul 26, 2017 at 16:48
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    $\begingroup$ Are NaN at beginning and end of the arrays? This is probably because of the moving average filtering method. For example, a two week moving average will result in two weeks of NaNs initially. $\endgroup$
    – Hobbes
    Commented Jul 26, 2017 at 16:55

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