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Posted to issues@spark.apache.org by "Shivaram Venkataraman (JIRA)" <ji...@apache.org> on 2015/08/02 23:36:04 UTC
[jira] [Commented] (SPARK-6823) Add a model.matrix like capability
to DataFrames (modelDataFrame)
[ https://issues.apache.org/jira/browse/SPARK-6823?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14651196#comment-14651196 ]
Shivaram Venkataraman commented on SPARK-6823:
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[~ekhliang] [~mengxr] Is this addressed by the StringType PR ? I'm wondering if we can resolve this issue
> Add a model.matrix like capability to DataFrames (modelDataFrame)
> -----------------------------------------------------------------
>
> Key: SPARK-6823
> URL: https://issues.apache.org/jira/browse/SPARK-6823
> Project: Spark
> Issue Type: New Feature
> Components: ML, SparkR
> Reporter: Shivaram Venkataraman
>
> Currently Mllib modeling tools work only with double data. However, data tables in practice often have a set of categorical fields (factors in R), that need to be converted to a set of 0/1 indicator variables (making the data actually used in a modeling algorithm completely numeric). In R, this is handled in modeling functions using the model.matrix function. Similar functionality needs to be available within Spark.
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