.AdvancedNoise.Generators.QuickXorshift64star.initialState

Information

Syntax

state = Xorshift64star.initialState(localSeed, globalSeed, p);

Description

Generates the initial state vector state for the Xorshift64star random number generator (= xorshift64* algorithm), from two Integer numbers given as input (arguments localSeed, globalSeed). Any Integer numbers can be given (including zero or negative number). The function returns a reasonable initial state vector with the following strategy:

If both input arguments are zero, a fixed non-zero value is used internally for localSeed. According to xorshift.pdf, the xorshift64* random number generator generates statistically random numbers from a bad seed within one iteration. To be on the safe side, actually 5 random numbers are generated and the returned state is the one from the last iteration. The number of iterations can be modified by input p.

Example

  parameter Integer localSeed;
  parameter Integer globalSeed;
  Integer state[Xorshift64star.nState];
initial equation
  state = initialState(localSeed, globalSeed);

See also

Random.Generators.Xorshift64star.random.

Revisions

Date	Description
June 22, 2015	Initial version implemented by A. Klöckner, F. v.d. Linden, D. Zimmer, M. Otter. DLR Institute of System Dynamics and Control