DOC fix typo in log loss formula for trees
@@ -529,7 +529,7 @@ Entropy:
.. math::
- \mathrm{LL}(D, T) = -\sum_{m \in T} \frac{n_m}{n} H(Q_m)
+ \mathrm{LL}(D, T) = \sum_{m \in T} \frac{n_m}{n} H(Q_m)
Regression criteria
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