CODEWITHSUNDEEP
python
Philipp
Philipp

Reputation: 415

How to feed in a time-series into pyunicorn.timeseries.surrogates?

I struggle to find out how to feed a time-series that consists of a one-column .txt file into pyunicorn’s timeseries.surrogates. My one-column .txt file contains many numerical datapoints that constitute the time-series.

Pyunicorn offers several examples how to apply its surrogate methods in this link: http://www.pik-potsdam.de/~donges/pyunicorn/api/timeseries/surrogates.html

Paradigmatically, the last surrogate option in the link above, namely for white_noise_surrogates(original_data), Pyunicorn offers the following explanatory code.

ts = Surrogates.SmallTestData().original_data
surrogates = Surrogates.SmallTestData().white_noise_surrogates(ts)

Clearly, the example data SmallTestData() is part of pyunicorn. But how would I have to enter my data, that is, Data_2, into the code above? The code

surrogates = Surrogates.white_noise_surrogates(Data_2) returns the message

TypeError: Surrogates.correlated_noise_surrogates() missing 1 required positional argument: 'original_data'

Trying the code in another try

TS = Surrogates.Data_2().original_data
Surrogate = Surrogates.correlated_noise_surrogates(TS)

returns into the message

AttributeError: type object 'Surrogates' has no attribute 'Data_2'

I assume that there is a simple solution, but I cannot figure it out. Here is an overview of my code:

from pyunicorn.timeseries import Surrogates
import pyunicorn as pn
Data_2 = np.loadtxt("/path-to-data.txt")
   
# Surrogate time-series
TS = Surrogates.Data_2().original_data
Surrogate = Surrogates.correlated_noise_surrogates(TS)

Does anyone understand how to properly feed or insert a time-series into pyunicorn’s timeseries.surrogates options?

Upvotes: 1

Views: 194

Answers (1)

Gerold Baier
Gerold Baier

Reputation: 21

You need to instantiate the class Surrogates with your data

TS = Surrogates(original_data=Data_2)     
my_surr = TS.correlated_noise_surrogates(Data_2)

Upvotes: 2

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