"Unknown variables or column: 'abs((trip_duration_min - pred_final))'" about vaex-examples HOT 3 CLOSED

Sorry, I found the reason!!!
After I split train-test dataframe with index slice, it works again.

But I really would like to ask why we can not use condition to split dataframe like below. Hope this question won't bother you.

df_train = df[df.pickup_datetime < np.datetime64('2015-01-01')]
df_test = df[df.pickup_datetime >= np.datetime64('2015-01-01')]

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Hey,

Yeah so you can't really use filtering since that becomes part of the automatic pipeline, so it propagates further. Just like any other filtering that is done during the "data cleaning" phase.

from vaex-examples.

Thanks for your instant reply

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