edu.cornell.lassp.houle.RngPack

Class RandomShuffle

java.lang.Object

edu.cornell.lassp.houle.RngPack.RandomElement

edu.cornell.lassp.houle.RngPack.RandomShuffle

All Implemented Interfaces:

java.lang.Cloneable

public class RandomShuffle
extends RandomElement

RandomShuffle uses one random number generator to shuffle the numbers produced by another to obliterate sequential correlations. To initialize a RandomShuffle, pass it two RandomElements. The first RandomElement is used to generate a table of random numbers and the second is used to choose one from the table. An example of usage is,

 RandomElement markov=new RandomShuffle(new Ranecu(),new Ranmar(),32)
 

which would generate a deck of 32 numbers from RANECU and use RANMAR to choose from the deck.
References:

• F. James; Comp. Phys. Comm. 60 (1990) p 329-344
• D. Knuth; The Art of Computer Programming vol. 2, sec 3.2.2

Source code is available.

Constructor Summary

Constructors

Constructor and Description
RandomShuffle(RandomElement ga, RandomElement gb, int ds)

Method Summary

Modifier and Type	Method and Description
double	raw() The generator.

Methods inherited from class edu.cornell.lassp.houle.RngPack.RandomElement

choose, choose, clone, coin, coin, gaussian, gaussian, powlaw, raw, raw, uniform

Methods inherited from class java.lang.Object

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

Constructor Detail

RandomShuffle

public RandomShuffle(RandomElement ga,
                     RandomElement gb,
                     int ds)

Parameters:

ga - generator to fill shuffle deck

gb - geberator to choose from shuffle deck

ds - the size of the shuffle deck

Method Detail

raw

public double raw()

The generator.

Specified by:

raw in class RandomElement

Returns:

a random double in the range [0,1]

See Also:

RandomElement.raw()