Comments (1)
Hi @aleave,
The easiest way would be to first split your time series in two parts, train on the first part and forecast from there (much like what is done in the example notebooks with training and validation sets):
training, validation = series.split_before(pd.Timestamp('xxx'))
model.fit(training)
forecast = model.predict(len(validation))
You can then plot forecast
against the original time series series
:
import matplotlib.pyplot as plt
series.plot()
forecast.plot()
plt.show()
One important thing to note though is that this trains the model only on the points lying before the specified timestamp, not on the whole time series. Currently there is no easy way to make a prediction from an earlier time than the end of the time series the model was trained on.
–––
Also note for your convenience that there is a get_timestamp_at_point()
method you can import from darts.utils
, which lets you convert a ratio to a timestamp. E.g. to split training 70% – validation 30% you can do:
from darts.utils import get_timestamp_at_point
training, validation = series.split_before(get_timestamp_at_point(0.7, series))
Finally, allowing for a more natural series.split_before(0.7)
is also already on our radar :)
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