Packages

t

org.apache.spark.util.random

RandomSampler

trait RandomSampler[T, U] extends Pseudorandom with Cloneable with Serializable

:: DeveloperApi :: A pseudorandom sampler. It is possible to change the sampled item type. For example, we might want to add weights for stratified sampling or importance sampling. Should only use transformations that are tied to the sampler and cannot be applied after sampling.

T

item type

U

sampled item type

Annotations
@DeveloperApi()
Linear Supertypes
Serializable, Serializable, Cloneable, Cloneable, Pseudorandom, AnyRef, Any
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Inherited
  1. RandomSampler
  2. Serializable
  3. Serializable
  4. Cloneable
  5. Cloneable
  6. Pseudorandom
  7. AnyRef
  8. Any
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Visibility
  1. Public
  2. All

Abstract Value Members

  1. abstract def sample(): Int

    Whether to sample the next item or not.

    Whether to sample the next item or not. Return how many times the next item will be sampled. Return 0 if it is not sampled.

  2. abstract def setSeed(seed: Long): Unit

    Set random seed.

    Set random seed.

    Definition Classes
    Pseudorandom

Concrete Value Members

  1. final def !=(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  2. final def ##(): Int
    Definition Classes
    AnyRef → Any
  3. final def ==(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  4. final def asInstanceOf[T0]: T0
    Definition Classes
    Any
  5. def clone(): RandomSampler[T, U]

    return a copy of the RandomSampler object

    return a copy of the RandomSampler object

    Definition Classes
    RandomSampler → AnyRef
  6. final def eq(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  7. def equals(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  8. def finalize(): Unit
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] )
  9. final def getClass(): Class[_]
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  10. def hashCode(): Int
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  11. final def isInstanceOf[T0]: Boolean
    Definition Classes
    Any
  12. final def ne(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  13. final def notify(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  14. final def notifyAll(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  15. def sample(items: Iterator[T]): Iterator[U]

    take a random sample

  16. final def synchronized[T0](arg0: ⇒ T0): T0
    Definition Classes
    AnyRef
  17. def toString(): String
    Definition Classes
    AnyRef → Any
  18. final def wait(): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  19. final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  20. final def wait(arg0: Long): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... ) @native()

Inherited from Serializable

Inherited from Serializable

Inherited from Cloneable

Inherited from Cloneable

Inherited from Pseudorandom

Inherited from AnyRef

Inherited from Any

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