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class DMatrix extends AnyRef

DMatrix for xgboost.

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Instance Constructors

  1. new DMatrix(handle: Long)

    used for DMatrix slice

    used for DMatrix slice

    Attributes
    protected[ml.dmlc.xgboost4j.java]
  2. new DMatrix(matrix: BigDenseMatrix, missing: Float)

    create DMatrix from dense matrix

    create DMatrix from dense matrix

    matrix

    instance of BigDenseMatrix

    missing

    the specified value to represent the missing value

  3. new DMatrix(data: Array[Float], nrow: Int, ncol: Int, missing: Float)

    create DMatrix from dense matrix

    create DMatrix from dense matrix

    data

    data values

    nrow

    number of rows

    ncol

    number of columns

    missing

    the specified value to represent the missing value

  4. new DMatrix(matrix: BigDenseMatrix)

    create DMatrix from a BigDenseMatrix

    create DMatrix from a BigDenseMatrix

    matrix

    instance of BigDenseMatrix

    Exceptions thrown

    XGBoostError native error

  5. new DMatrix(data: Array[Float], nrow: Int, ncol: Int)

    create DMatrix from dense matrix

    create DMatrix from dense matrix

    data

    data values

    nrow

    number of rows

    ncol

    number of columns

    Exceptions thrown

    XGBoostError native error

  6. new DMatrix(headers: Array[Long], indices: Array[Int], data: Array[Float], st: SparseType, shapeParam: Int)

    Create DMatrix from Sparse matrix in CSR/CSC format.

    Create DMatrix from Sparse matrix in CSR/CSC format.

    headers

    The row index of the matrix.

    indices

    The indices of presenting entries.

    data

    The data content.

    st

    Type of sparsity.

    shapeParam

    when st is CSR, it specifies the column number, otherwise it is taken as row number

    Exceptions thrown
  7. new DMatrix(headers: Array[Long], indices: Array[Int], data: Array[Float], st: SparseType)

    Create DMatrix from Sparse matrix in CSR/CSC format.

    Create DMatrix from Sparse matrix in CSR/CSC format.

    headers

    The row index of the matrix.

    indices

    The indices of presenting entries.

    data

    The data content.

    st

    Type of sparsity.

    Exceptions thrown
  8. new DMatrix(dataPath: String)

    Create DMatrix by loading libsvm file from dataPath

    Create DMatrix by loading libsvm file from dataPath

    dataPath

    The path to the data.

    Exceptions thrown
  9. new DMatrix(iter: Iterator[LabeledPoint], cacheInfo: String)

Value Members

  1. final def !=(arg0: Any): Boolean
    Definition Classes
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  2. final def ##(): Int
    Definition Classes
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  3. final def ==(arg0: Any): Boolean
    Definition Classes
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  4. final def asInstanceOf[T0]: T0
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  5. def clone(): AnyRef
    Attributes
    protected[java.lang]
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    @native() @throws( ... )
  6. def dispose(): Unit
  7. final def eq(arg0: AnyRef): Boolean
    Definition Classes
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  8. def equals(arg0: Any): Boolean
    Definition Classes
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  9. def finalize(): Unit
    Attributes
    protected[ml.dmlc.xgboost4j.java]
    Definition Classes
    DMatrix → AnyRef
  10. def getBaseMargin(): Array[Float]

    Get base margin of the DMatrix.

  11. final def getClass(): Class[_]
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  12. def getGroup(): Array[Int]

    Get group sizes of DMatrix

    Get group sizes of DMatrix

    returns

    group size as array

    Exceptions thrown

    XGBoostError native error

  13. def getHandle(): Long

    Get the handle

  14. def getLabel(): Array[Float]

    get label values

    get label values

    returns

    label

    Exceptions thrown

    XGBoostError native error

  15. def getWeight(): Array[Float]

    get weight of the DMatrix

    get weight of the DMatrix

    returns

    weights

    Exceptions thrown

    XGBoostError native error

  16. def hashCode(): Int
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  17. final def isInstanceOf[T0]: Boolean
    Definition Classes
    Any
  18. final def ne(arg0: AnyRef): Boolean
    Definition Classes
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  19. final def notify(): Unit
    Definition Classes
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    Annotations
    @native()
  20. final def notifyAll(): Unit
    Definition Classes
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    Annotations
    @native()
  21. def rowNum(): Long

    get the row number of DMatrix

    get the row number of DMatrix

    returns

    number of rows

    Exceptions thrown

    XGBoostError native error

  22. def saveBinary(filePath: String): Unit

    save DMatrix to filePath

  23. def setBaseMargin(baseMargin: Array[Array[Float]]): Unit

    Set base margin (initial prediction).

  24. def setBaseMargin(baseMargin: Array[Float]): Unit

    Set base margin (initial prediction).

    Set base margin (initial prediction).

    The margin must have the same number of elements as the number of rows in this matrix.

  25. def setGroup(group: Array[Int]): Unit

    Set group sizes of DMatrix (used for ranking)

    Set group sizes of DMatrix (used for ranking)

    group

    group size as array

    Exceptions thrown

    XGBoostError native error

  26. def setLabel(labels: Array[Float]): Unit

    set label of dmatrix

    set label of dmatrix

    labels

    labels

    Exceptions thrown

    XGBoostError native error

  27. def setWeight(weights: Array[Float]): Unit

    set weight of each instance

    set weight of each instance

    weights

    weights

    Exceptions thrown

    XGBoostError native error

  28. def slice(rowIndex: Array[Int]): DMatrix

    Slice the DMatrix and return a new DMatrix that only contains rowIndex.

    Slice the DMatrix and return a new DMatrix that only contains rowIndex.

    rowIndex

    row index

    returns

    sliced new DMatrix

    Exceptions thrown

    XGBoostError native error

  29. final def synchronized[T0](arg0: ⇒ T0): T0
    Definition Classes
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  30. def toString(): String
    Definition Classes
    AnyRef → Any
  31. final def wait(): Unit
    Definition Classes
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    @throws( ... )
  32. final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
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    @throws( ... )
  33. final def wait(arg0: Long): Unit
    Definition Classes
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    @native() @throws( ... )

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