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check_array added to fit in iforest and ecod

Open Luís Seabra requested to merge github/fork/luismavs/check_array into development

Hey,

For iforest models fitted with pandas Dataframes and then scored with decision_function() on pandas DataFrames, the following warning pops up:

xxxx/site-packages/sklearn/base.py:402: UserWarning: X has feature names, but IsolationForest was fitted without feature names

I have added very simple scikit learn utils check_array() to X in decision_function() to iforest (and ecod) models to suppress the warning.

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