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Merge pull request #1882 from ojschumann/stats_branch

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Implementation of openmc.stats.Mixture distribution
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Paul Romano 2021-10-01 11:24:29 -05:00 • committed by GitHub
commit fa500e2896
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8 changed files with 166 additions and 17 deletions
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33
include/openmc/distribution.h
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@ -24,6 +24,14 @@ public:
virtual double sample(uint64_t* seed) const = 0;
};
using UPtrDist = unique_ptr<Distribution>;
//! Return univariate probability distribution specified in XML file
//! \param[in] node XML node representing distribution
//! \return Unique pointer to distribution
UPtrDist distribution_from_xml(pugi::xml_node node);
//==============================================================================
//! A discrete distribution (probability mass function)
//==============================================================================
@ -222,12 +230,27 @@ private:
vector<double> x_; //! Possible outcomes
};
using UPtrDist = unique_ptr<Distribution>;
//==============================================================================
//! Mixture distribution
//==============================================================================
class Mixture : public Distribution {
public:
explicit Mixture(pugi::xml_node node);
//! Sample a value from the distribution
//! \param seed Pseudorandom number seed pointer
//! \return Sampled value
double sample(uint64_t* seed) const;
private:
// Storrage for probability + distribution
using DistPair = std::pair<double, UPtrDist>;
vector<DistPair>
distribution_; //!< sub-distributions + cummulative probabilities
};
//! Return univariate probability distribution specified in XML file
//! \param[in] node XML node representing distribution
//! \return Unique pointer to distribution
UPtrDist distribution_from_xml(pugi::xml_node node);
} // namespace openmc