actuaryzhang commented on issue #17864: [SPARK-20604][ML] Allow imputer to handle numeric types URL: https://github.com/apache/spark/pull/17864#issuecomment-516972800 @srowen @holdenk Made an update to preserve input data type. Logic is to convert input to Double internally, compute mean/median, do imputation, and then cast back to original data type. Updated the doc and test accordingly. Please take a look. Thanks.
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