lightgbm 如何处理没有进一步 split 与正增益，最佳增益 : -inf

Question

如何处理 [警告] 没有进一步 split ，正增益，最佳增益:-inf
有什么参数不合适吗？

Answer 1

lightGBM 问题的一些解释:

it means the learning of tree in current iteration should be stop, due to cannot split any more.

I think this is caused by "min_data_in_leaf":1000, you can set it to a smaller value.

This is not a bug, it is a feature.

The output message is to warn user that your parameters may be wrong, or your dataset is not easy to learn.

链接: https://github.com/Microsoft/LightGBM/issues/640
所以相反，数据很难拟合。