Github user manishamde commented on the pull request:
https://github.com/apache/spark/pull/886#issuecomment-45141375
I added support for sorting categorical feature values using impurity
(gini/entropy) calculated over the corresponding labels in multiclass
classification. This heuristic will only be used when it's not feasible to
check for all the categorical splits in multiclass classification.
cc: @srowen, @etrain
---
If your project is set up for it, you can reply to this email and have your
reply appear on GitHub as well. If your project does not have this feature
enabled and wishes so, or if the feature is enabled but not working, please
contact infrastructure at [email protected] or file a JIRA ticket
with INFRA.
---
