Trait

org.apache.spark.mllib.tree.impurity

Impurity

Related Doc: package impurity

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trait Impurity extends Serializable

Trait for calculating information gain. This trait is used for (a) setting the impurity parameter in org.apache.spark.mllib.tree.configuration.Strategy (b) calculating impurity values from sufficient statistics.

Annotations
@Since( "1.0.0" )
Source
Impurity.scala
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Serializable, Serializable, AnyRef, Any
Known Subclasses
Entropy, Gini, Variance
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Abstract Value Members

  1. abstract def calculate(count: Double, sum: Double, sumSquares: Double): Double

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    :: DeveloperApi :: information calculation for regression

    :: DeveloperApi :: information calculation for regression

    count

    number of instances

    sum

    sum of labels

    sumSquares

    summation of squares of the labels

    returns

    information value, or 0 if count = 0

    Annotations
    @Since( "1.0.0" ) @DeveloperApi()

  2. abstract 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

    Annotations
    @Since( "1.1.0" ) @DeveloperApi()

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

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  7. def equals(arg0: Any): Boolean

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  8. def finalize(): Unit

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

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  10. def hashCode(): Int

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  11. final def isInstanceOf[T0]: Boolean

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

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  13. final def notify(): Unit

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  14. final def notifyAll(): Unit

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

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  16. def toString(): String

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  17. final def wait(): Unit

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

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

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