Class

org.apache.spark.util

DoubleAccumulator

Related Doc: package util

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class DoubleAccumulator extends AccumulatorV2[Double, Double]

An accumulator for computing sum, count, and averages for double precision floating numbers.

Source
AccumulatorV2.scala
Since

2.0.0

Linear Supertypes
AccumulatorV2[Double, Double], Serializable, Serializable, AnyRef, Any
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Inherited
  1. DoubleAccumulator
  2. AccumulatorV2
  3. Serializable
  4. Serializable
  5. AnyRef
  6. Any
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Visibility
  1. Public
  2. All

Instance Constructors

  1. new DoubleAccumulator()

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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. def add(v: Double): Unit

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    Adds v to the accumulator, i.e.

    Adds v to the accumulator, i.e. increment sum by v and count by 1.

    Since

    2.0.0

  5. def add(v: Double): Unit

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    Adds v to the accumulator, i.e.

    Adds v to the accumulator, i.e. increment sum by v and count by 1.

    Definition Classes
    DoubleAccumulatorAccumulatorV2
    Since

    2.0.0

  6. final def asInstanceOf[T0]: T0

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    Definition Classes
    Any
  7. def avg: Double

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    Returns the average of elements added to the accumulator.

    Returns the average of elements added to the accumulator.

    Since

    2.0.0

  8. def clone(): AnyRef

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    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  9. def copy(): DoubleAccumulator

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    Creates a new copy of this accumulator.

    Creates a new copy of this accumulator.

    Definition Classes
    DoubleAccumulatorAccumulatorV2
  10. def copyAndReset(): AccumulatorV2[Double, Double]

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    Creates a new copy of this accumulator, which is zero value.

    Creates a new copy of this accumulator, which is zero value. i.e. call isZero on the copy must return true.

    Definition Classes
    AccumulatorV2
  11. def count: Long

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    Returns the number of elements added to the accumulator.

    Returns the number of elements added to the accumulator.

    Since

    2.0.0

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

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    Definition Classes
    AnyRef
  13. def equals(arg0: Any): Boolean

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    Definition Classes
    AnyRef → Any
  14. def finalize(): Unit

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    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] )
  15. final def getClass(): Class[_]

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    Definition Classes
    AnyRef → Any
  16. def hashCode(): Int

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    Definition Classes
    AnyRef → Any
  17. final def id: Long

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    Returns the id of this accumulator, can only be called after registration.

    Returns the id of this accumulator, can only be called after registration.

    Definition Classes
    AccumulatorV2
  18. final def isInstanceOf[T0]: Boolean

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    Definition Classes
    Any
  19. final def isRegistered: Boolean

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    Returns true if this accumulator has been registered.

    Returns true if this accumulator has been registered.

    Definition Classes
    AccumulatorV2
    Note

    All accumulators must be registered before use, or it will throw exception.

  20. def isZero: Boolean

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    Returns false if this accumulator has had any values added to it or the sum is non-zero.

    Returns false if this accumulator has had any values added to it or the sum is non-zero.

    Definition Classes
    DoubleAccumulatorAccumulatorV2
  21. def merge(other: AccumulatorV2[Double, Double]): Unit

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    Merges another same-type accumulator into this one and update its state, i.e.

    Merges another same-type accumulator into this one and update its state, i.e. this should be merge-in-place.

    Definition Classes
    DoubleAccumulatorAccumulatorV2
  22. final def name: Option[String]

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    Returns the name of this accumulator, can only be called after registration.

    Returns the name of this accumulator, can only be called after registration.

    Definition Classes
    AccumulatorV2
  23. final def ne(arg0: AnyRef): Boolean

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    Definition Classes
    AnyRef
  24. final def notify(): Unit

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    Definition Classes
    AnyRef
  25. final def notifyAll(): Unit

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    Definition Classes
    AnyRef
  26. def reset(): Unit

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    Resets this accumulator, which is zero value.

    Resets this accumulator, which is zero value. i.e. call isZero must return true.

    Definition Classes
    DoubleAccumulatorAccumulatorV2
  27. def sum: Double

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    Returns the sum of elements added to the accumulator.

    Returns the sum of elements added to the accumulator.

    Since

    2.0.0

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

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    Definition Classes
    AnyRef
  29. def toString(): String

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    Definition Classes
    AccumulatorV2 → AnyRef → Any
  30. def value: Double

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    Defines the current value of this accumulator

    Defines the current value of this accumulator

    Definition Classes
    DoubleAccumulatorAccumulatorV2
  31. final def wait(): Unit

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    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  32. final def wait(arg0: Long, arg1: Int): Unit

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    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  33. final def wait(arg0: Long): Unit

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    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  34. final def writeReplace(): Any

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    Attributes
    protected
    Definition Classes
    AccumulatorV2

Inherited from AccumulatorV2[Double, Double]

Inherited from Serializable

Inherited from Serializable

Inherited from AnyRef

Inherited from Any

Ungrouped