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Performs ADF test just as another tool to check stationarity.
prep.check.adf(tserie)
a ts or a prep object
ts
prep
Shows the results of an ADF test. A p-value<0.05 suggests the data is stationary.
# NOT RUN { prep.check.adf(AirPassengers) prep.check.adf(prep(AirPassengers)) # }
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