Github user WeichenXu123 commented on the issue:
https://github.com/apache/spark/pull/13796
@dbtsai
simply say, when reg==0, the minimizer is not a point but becomes a plane.
so the second derivative on the plane will turn into zero. so ...
and I give a reference here:
http://ufldl.stanford.edu/wiki/index.php/Softmax_Regression
it mentions this problem.
---
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.
---
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
