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We provide a new random number generator (RNG) with this package, available both
in Fortran90 and C++.
It resides in src/f90/mod/rngmod.f90 and src/cxx/cxxsupport/planck_rng.h and supersedes the previous RNG (which
is still available at src/f90/mod/ran_tools_dist.f90).
It produces double precision real numbers x with ![$x\in]0,1[$](introimg159.png) and is based
on a xorshift method described by Marsaglia in
Journal of Statistical Software 2003, vol 8
(cf. http://www.cs.hku.hk/).
It accepts up to four different seeds simultaneously, allowing each sequence to
have a
theoretical period of
 . A Gaussian deviate RNG is
also provided. See the respective routines documentation for details on their usage.
Please note that we have not extensively tested this generator
-- it did not represent the main drive of this project.
Eric Hivon
2010-06-18
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