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w4k2 / stream-learn

The stream-learn is an open-source Python library for difficult data stream analysis.
https://stream-learn.readthedocs.io
GNU General Public License v3.0
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A bug in the partial_fit function #35

Open yousefabdi opened 1 year ago

yousefabdi commented 1 year ago

Hello,

At first, I would like to thank for developing this great package. It was nececcary for stream mining research community.

I have a problem with "partial_fit" function when using on multi-class datasets. The error message I get is as follows: ValueError: could not broadcast input array from shape (2,) into shape (3,)

I attached the dataset. RBF_Gradual3Class.csv

When I set the "classes" argument of the "partial_fit" in the KUE algorithm, it works. clf.partial_fit(X_train, y_train, classes=labels)

However, in other algorithms, UOB for example, I get the same error by setting the "classes" argument too.

❌❌❌ The error is on _self.current_tdcs__

yousefabdi commented 1 year ago

Most of the multi-class algorithms have issues with multi-class datasets.

❌ NIE.py: on f1-score