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issue #1400 #1514

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4 changes: 3 additions & 1 deletion src/evidently/calculations/stattests/psi.py
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Original file line number Diff line number Diff line change
Expand Up @@ -48,7 +48,7 @@ def _psi(
psi_value: calculated PSI
test_result: whether the drift is detected
"""
reference_percents, current_percents = get_binned_data(reference_data, current_data, feature_type, n_bins)
reference_percents, current_percents = get_binned_data(reference_data, current_data, feature_type, n=n_bins)

psi_values = (reference_percents - current_percents) * np.log(reference_percents / current_percents)
psi_value = np.sum(psi_values)
Expand All @@ -64,3 +64,5 @@ def _psi(
)

register_stattest(psi_stat_test, _psi)


2 changes: 1 addition & 1 deletion src/evidently/calculations/stattests/utils.py
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Expand Up @@ -27,7 +27,7 @@ def get_binned_data(
n_vals = reference_data.nunique()

if feature_type == ColumnType.Numerical and n_vals > 20:
bins = np.histogram_bin_edges(pd.concat([reference_data, current_data], axis=0).values, bins="sturges")
bins = np.histogram_bin_edges(pd.concat([reference_data, current_data], axis=0).values, bins=n)
reference_percents = np.histogram(reference_data, bins)[0] / len(reference_data)
current_percents = np.histogram(current_data, bins)[0] / len(current_data)

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