[jira] [Created] (SPARK-10117) Implement SQL data source API for reading LIBSVM data

["Xiangrui Meng (JIRA)" <ji...@apache.org>]

Xiangrui Meng created SPARK-10117:
-------------------------------------

             Summary: Implement SQL data source API for reading LIBSVM data
                 Key: SPARK-10117
                 URL: https://issues.apache.org/jira/browse/SPARK-10117
             Project: Spark
          Issue Type: New Feature
          Components: ML
            Reporter: Xiangrui Meng


It is convenient to implement data source API for LIBSVM format to have a better integration with DataFrames and ML pipeline API.

{code}
import org.apache.spark.ml.source.libsvm._

val training = sqlContext.read
  .format("libsvm")
  .option("numFeatures", "10000")
  .load("path")
{code}

This JIRA covers the following:

1. Read LIBSVM data as a DataFrame with two columns: label: Double and features: Vector.
2. Accept `numFeatures` as an option.
3. The implementation should live under `org.apache.spark.ml.source.libsvm`.



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