Package io.virtdata.libbasics.core.stathelpers

Class AliasElementSampler<T>

  • All Implemented Interfaces:
    java.util.function.DoubleFunction<T>
    public class AliasElementSampler<T>
extends java.lang.Object
implements java.util.function.DoubleFunction<T>
    Uses the alias sampling method to encode and sample from discrete probabilities, even over larger sets of data. This form requires a unit interval sample value between 0.0 and 1.0. Assuming the maximal amount of memory is used for distinct outcomes N, a memory buffer of N*16 bytes is required for this implementation, requiring 32MB of memory for 1M entries. This sampler should be shared between threads, and will be by default, in order to avoid many instances of a 32MB buffer on heap.

    • Method Summary

      Modifier and Type Method Description
      T apply​(double value)  

      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

    • Constructor Detail

      • AliasElementSampler

        public AliasElementSampler​(java.util.List<ElemProbD<T>> events)

    • Method Detail

      • apply

        public T apply​(double value)
        Specified by:
        apply in interface java.util.function.DoubleFunction<T>