AliasElementSampler (VirtualDataSet API)

java.lang.Object
- io.virtdata.stathelpers.aliasmethod.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.

- Nested Class Summary
  
  Nested Classes
  Modifier and Type Class Description
  
  static interface AliasElementSampler.Weighted
- Constructor Summary
  
  Constructors
  Constructor Description
  
  AliasElementSampler(java.util.List<io.virtdata.stathelpers.ElemProbD<T>> events)
- 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<io.virtdata.stathelpers.ElemProbD<T>> events)

Method Detail
- apply
```
public T apply(double value)
```
  Specified by:
  
  apply in interface java.util.function.DoubleFunction<T>