org.apache.spark.util.random
Interface RandomSampler<T,U>

All Superinterfaces:

Cloneable, Pseudorandom, java.io.Serializable

All Known Implementing Classes:

BernoulliCellSampler, BernoulliSampler, PoissonSampler

public interface RandomSampler<T,U>
extends Pseudorandom, scala.Cloneable, scala.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.

Method Summary

RandomSampler<T,U>	clone() return a copy of the RandomSampler object
scala.collection.Iterator<U>	sample(scala.collection.Iterator<T> items) take a random sample

Methods inherited from interface org.apache.spark.util.random.Pseudorandom

setSeed

Method Detail

sample

scala.collection.Iterator<U> sample(scala.collection.Iterator<T> items)

take a random sample

clone

RandomSampler<T,U> clone()

return a copy of the RandomSampler object