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
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- @DeveloperApi()
- Source
- RandomSampler.scala
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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.
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abstract
def
setSeed(seed: Long): Unit
Set random seed.
Set random seed.
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- Pseudorandom
Concrete Value Members
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final
def
!=(arg0: Any): Boolean
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final
def
##(): Int
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def
==(arg0: Any): Boolean
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final
def
asInstanceOf[T0]: T0
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def
clone(): RandomSampler[T, U]
return a copy of the RandomSampler object
return a copy of the RandomSampler object
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final
def
eq(arg0: AnyRef): Boolean
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def
equals(arg0: Any): Boolean
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def
finalize(): Unit
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def
getClass(): Class[_]
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def
hashCode(): Int
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notify(): Unit
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def
notifyAll(): Unit
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def
sample(items: Iterator[T]): Iterator[U]
take a random sample
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final
def
synchronized[T0](arg0: ⇒ T0): T0
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def
toString(): String
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def
wait(): Unit
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def
wait(arg0: Long, arg1: Int): Unit
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def
wait(arg0: Long): Unit
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