Shivaram Venkataraman created SPARK-6823:
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Summary: 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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