initialStateReturns an initial state for the xorshift64* algorithm |
This information is part of the Modelica Standard Library maintained by the Modelica Association.
state = Xorshift64star.initialState(localSeed, globalSeed);
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 10 random numbers are generated and the returned state is the one from the last iteration.
parameter Integer localSeed; parameter Integer globalSeed; Integer state[Xorshift64star.nState]; initial equation state = initialState(localSeed, globalSeed);
localSeed |
Type: Integer Description: The local seed to be used for generating initial states |
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globalSeed |
Type: Integer Description: The global seed to be combined with the local seed |
state |
Type: Integer[nState] Description: The generated initial states |
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