zhengruifeng created SPARK-17848:
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Summary: Move LabelCol datatype cast into Predictor.fit
Key: SPARK-17848
URL: https://issues.apache.org/jira/browse/SPARK-17848
Project: Spark
Issue Type: Improvement
Components: ML
Reporter: zhengruifeng
`Classifier.getNumClasses` can not support Non-Double types, and classification
algos relying on it do not support non-double labelCol (like `NavieBayes`)
As suggested by [~sethah], it is not a reasonable way to do datatype cast
everywhere. And we can make cast only happen in `Predictor`.
[~yanboliang][~josephkb][~srowen]
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