Github user Lewuathe commented on the pull request:
https://github.com/apache/spark/pull/3975#issuecomment-70211978
@srowen @mengxr There seems to be no checking labels logics on each
algorithms when importing `LabeledPoint`. But these are only check for first
access to `LabeledPoint`. If anyone make checking code to `LabeledPoint` as
client or jobs for spark, I found those will broken. I'm sorry but eventually
it is better to throw exceptions which means `Impurity` does not support
negative labels. What do you think about it?
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