程序包 dev.utils.common.random

类 AliasMethod

java.lang.Object
dev.utils.common.random.AliasMethod
public final class AliasMethod extends Object
detail: 随机概率采样算法
作者:
Keith Schwarz 


另请参阅:


















    


  • 

    

    构造器详细资料
    

      

    • 

      

      AliasMethod
      

      public AliasMethod(List<Double> probabilities)
      

      Constructs a new AliasMethod to sample from a discrete distribution and
 hand back outcomes based on the probability distribution.
 
      
 Given as input a list of probabilities corresponding to outcomes 0, 1,
 ..., n - 1, this constructor creates the probability and alias tables
 needed to efficiently sample from this distribution.
      

      

      参数:
      

      probabilities - The list of probabilities.
      

      

      

      • 

    • 

      

      AliasMethod
      

      public AliasMethod(List<Double> probabilities,
 Random random)
      

      Constructs a new AliasMethod to sample from a discrete distribution and
 hand back outcomes based on the probability distribution.
 
      
 Given as input a list of probabilities corresponding to outcomes 0, 1,
 ..., n - 1, along with the random number generator that should be used
 as the underlying generator, this constructor creates the probability
 and alias tables needed to efficiently sample from this distribution.
      

      

      参数:
      

      probabilities - The list of probabilities.
      

      random - The random number generator
      

      

      

      • 

    

    

    • 


  • 

    

    方法详细资料
    

      

    • 

      

      next
      

      public int next()
      

      获取随机索引 ( 对应几率索引 )
 Samples a value from the underlying distribution.
      

      

      返回:
      

      A random value sampled from the underlying distribution.
      

      

      

      • 

    

    

    •