cern.jet.random.engine
Class RandomSeedTable
java.lang.Object
cern.jet.random.engine.RandomSeedTable
public class RandomSeedTable
- extends Object
(Seemingly gigantic) table of good seeds for pseudo-random number generators.
Implementation:
This is a port of SeedTable.h used in CLHEP 1.4.0 (C++).
CLHEP's implementation, in turn, is part of GEANT 4, a C++ simulation toolkit for High Energy Physics.
Geant4, in turn, took the table from the original FORTRAN77 implementation of the HEP CERN Library routine RECUSQ.
Each sequence has a period of 10**9 numbers.
- Version:
- 1.0, 09/24/99
- Author:
- wolfgang.hoschek@cern.ch
Field Summary |
static int |
COLUMNS
The number of columns of the matrix (currently COLUMNS = 2). |
Constructor Summary |
protected |
RandomSeedTable()
Makes this class non instantiable, but still let's others inherit from it. |
Method Summary |
static int |
getSeedAtRowColumn(int row,
int column)
Returns a deterministic seed from a (seemingly gigantic) matrix of predefined seeds. |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
COLUMNS
public static final int COLUMNS
- The number of columns of the matrix (currently COLUMNS = 2).
- See Also:
- Constant Field Values
RandomSeedTable
protected RandomSeedTable()
- Makes this class non instantiable, but still let's others inherit from it.
getSeedAtRowColumn
public static int getSeedAtRowColumn(int row,
int column)
- Returns a deterministic seed from a (seemingly gigantic) matrix of predefined seeds.
- Parameters:
row
- should (but need not) be in [0,Integer.MAX_VALUE].column
- shoould (but need not) be in [0,SeedTable.COLUMNS-1].
- Returns:
- the seed at the indicated matrix position.
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