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Hi~

I am trying to reproduce this notebook, vaex-taxi-ml-article.ipynb.

But I encountered the error like below.
I almost completely follow your code.
I can not find the reason.
I share my colab notebook here.

KeyError Traceback (most recent call last)
/usr/local/lib/python3.7/dist-packages/vaex/scopes.py in evaluate(self, expression, out)
112 # logger.debug("try avoid evaluating: %s", expression)
--> 113 result = self[expression]
114 except KeyError:

34 frames
KeyError: "Unknown variables or column: 'abs((trip_duration_min - pred_final))'"

During handling of the above exception, another exception occurred:

KeyError Traceback (most recent call last)
KeyError: "Unknown variables or column: 'clip(predicted_duration_min, 3, 25)'"

During handling of the above exception, another exception occurred:

KeyError Traceback (most recent call last)
KeyError: "Unknown variables or column: 'incremental_prediction_function(PCA_pickup_0, PCA_pickup_1, PCA_dropoff_0, PCA_dropoff_1, standard_scaled_arc_distance, pickup_time_x, pickup_day_x, pickup_month_x, direction_angle_x, pickup_time_y, pickup_day_y, pickup_month_y, direction_angle_y, pickup_is_weekend)'"

During handling of the above exception, another exception occurred:

ValueError Traceback (most recent call last)
in ()

in ()

in ()

/usr/local/lib/python3.7/dist-packages/sklearn/utils/validation.py in check_array(array, accept_sparse, accept_large_sparse, dtype, order, copy, force_all_finite, ensure_2d, allow_nd, ensure_min_samples, ensure_min_features, estimator)
806 "Found array with %d sample(s) (shape=%s) while a"
807 " minimum of %d is required%s."
--> 808 % (n_samples, array.shape, ensure_min_samples, context)
809 )
810

ValueError: Found array with 0 sample(s) (shape=(0, 14)) while a minimum of 1 is required.

The notebook fails to download the ndf5 file - permission denied, as you can see if you access the link directly:
http://vaex.astro.rug.nl/data/helmi-dezeeuw-2000-FeH.hdf5