Method approximate

mla/ensemble/gbm.py:34–38

Approximate leaf value.

(self, actual, predicted)

        raise NotImplementedError()

    def approximate(self, actual, predicted):
        """Approximate leaf value."""
        return self.grad(actual, predicted).sum() / (
            self.hess(actual, predicted).sum() + self.regularization
        )

    def transform(self, pred):
        """Transform predictions values."""