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case class SampledData(numRows: Int, numCols: Int) extends Product with Serializable

SampledData: Encapsulates the sampled data need to initialize a LightGBM dataset. . LightGBM expects sampled data to be an array of vectors, where each feature column has a sparse representation of non-zero values (i.e. indexes and data vector). It also needs a #features sized array of element count per feature to know how long each column is. . Since we create sampled data as a self-contained set with ONLY sampled data and nothing else, the indexes are trivial (0 until #elements). We don't need to maintain original raw indexes. LightGBM only uses this data to get distributions, and does not care about raw row indexes. . This class manages keeping all the indexing in sync so callers can just push rows of data into it and retrieve the resulting pointers at the end. . Note: sample data row count is not expected to exceed max(Int), so we index with Ints.

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Instance Constructors

  1. new SampledData(numRows: Int, numCols: Int)

Value Members

  1. final def !=(arg0: Any): Boolean
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  2. final def ##(): Int
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  3. final def ==(arg0: Any): Boolean
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  4. final def asInstanceOf[T0]: T0
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  5. def clone(): AnyRef
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  6. def delete(): Unit
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  8. def finalize(): Unit
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  9. final def getClass(): Class[_]
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    @native()
  10. def getRowCounts: SWIGTYPE_p_int
  11. def getSampleData: SWIGTYPE_p_p_double
  12. def getSampleIndices: SWIGTYPE_p_p_int
  13. final def isInstanceOf[T0]: Boolean
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  14. final def ne(arg0: AnyRef): Boolean
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  15. final def notify(): Unit
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  16. final def notifyAll(): Unit
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    @native()
  17. val numCols: Int
  18. val numRows: Int
  19. def pushRow(rowData: SparseVector, index: Int): Unit
  20. def pushRow(rowData: Array[Double], index: Int): Unit
  21. def pushRow(rowData: DenseVector, index: Int): Unit
  22. def pushRow(rowData: Row, index: Int, featureColName: String): Unit
  23. val rowCounts: IntSwigArray
  24. val sampleData: DoublePointerSwigArray
  25. val sampleIndexes: IntPointerSwigArray
  26. final def synchronized[T0](arg0: ⇒ T0): T0
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  27. final def wait(): Unit
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  28. final def wait(arg0: Long, arg1: Int): Unit
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  29. final def wait(arg0: Long): Unit
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