Object

org.apache.spark.mllib.tree.impurity

Gini

Related Doc: package impurity

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object Gini extends Impurity

Class for calculating the Gini impurity (http://en.wikipedia.org/wiki/Decision_tree_learning#Gini_impurity) during multiclass classification.

Annotations
@Since( "1.0.0" )
Source
Gini.scala
Linear Supertypes
Impurity, Serializable, Serializable, AnyRef, Any
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  1. Gini
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Value Members

  1. final def !=(arg0: Any): Boolean

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    Definition Classes
    AnyRef → Any

  2. final def ##(): Int

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    Definition Classes
    AnyRef → Any

  3. final def ==(arg0: Any): Boolean

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    Definition Classes
    AnyRef → Any

  4. final def asInstanceOf[T0]: T0

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    Definition Classes
    Any

  5. def calculate(count: Double, sum: Double, sumSquares: Double): Double

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    :: DeveloperApi :: variance calculation

    :: DeveloperApi :: variance calculation

    count

    number of instances

    sum

    sum of labels

    sumSquares

    summation of squares of the labels

    returns

    information value, or 0 if count = 0

    Definition Classes
    Gini → Impurity
    Annotations
    @Since( "1.0.0" ) @DeveloperApi()

  6. def calculate(counts: Array[Double], totalCount: Double): Double

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    :: DeveloperApi :: information calculation for multiclass classification

    :: DeveloperApi :: information calculation for multiclass classification

    counts

    Array[Double] with counts for each label

    totalCount

    sum of counts for all labels

    returns

    information value, or 0 if totalCount = 0

    Definition Classes
    Gini → Impurity
    Annotations
    @Since( "1.1.0" ) @DeveloperApi()

  7. def clone(): AnyRef

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    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

  8. final def eq(arg0: AnyRef): Boolean

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    Definition Classes
    AnyRef

  9. def equals(arg0: Any): Boolean

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    Definition Classes
    AnyRef → Any

  10. def finalize(): Unit

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    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] )

  11. final def getClass(): Class[_]

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    Definition Classes
    AnyRef → Any

  12. def hashCode(): Int

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    Definition Classes
    AnyRef → Any

  13. def instance: Gini.this.type

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    Get this impurity instance.

    Get this impurity instance. This is useful for passing impurity parameters to a Strategy in Java.

    Annotations
    @Since( "1.1.0" )

  14. final def isInstanceOf[T0]: Boolean

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    Definition Classes
    Any

  15. final def ne(arg0: AnyRef): Boolean

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    Definition Classes
    AnyRef

  16. final def notify(): Unit

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    Definition Classes
    AnyRef

  17. final def notifyAll(): Unit

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    Definition Classes
    AnyRef

  18. final def synchronized[T0](arg0: ⇒ T0): T0

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    Definition Classes
    AnyRef

  19. def toString(): String

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    Definition Classes
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  20. final def wait(): Unit

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    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

  21. final def wait(arg0: Long, arg1: Int): Unit

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    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

  22. final def wait(arg0: Long): Unit

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    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

Inherited from Impurity

Inherited from Serializable

Inherited from Serializable

Inherited from AnyRef

Inherited from Any

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