FIX: Fix for changing mode

Author: larsoner

sklearn/base.py

@@ -343,7 +343,8 @@ def score(self, X, y, sample_weight=None):
         """
 
         from .metrics import r2_score
-        return r2_score(y, self.predict(X), sample_weight=sample_weight)
+        return r2_score(y, self.predict(X), sample_weight=sample_weight,
+                        multioutput='variance_weighted')
 
 
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