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boost::random::lognormal_distribution
// In header: <boost/random/lognormal_distribution.hpp> template<typename RealType> class lognormal_distribution { public: // types typedef normal_distribution< ; typedef ; // member classes/structs/unions class param_type { public: // types typedef lognormal_distribution ; // construct/copy/destruct ( = , = ); // public member functions () ; () ; // friend functions template<typename CharT, typename Traits> (, param_type &); template<typename CharT, typename Traits> (, param_type &); (param_type &, param_type &); (param_type &, param_type &); }; // construct/copy/destruct ( = , = ); (param_type &); // public member functions () ; () ; () ; () ; param_type () ; (param_type &); (); template<typename Engine> (); template<typename Engine> (, param_type &); // friend functions template<typename CharT, typename Traits> (, lognormal_distribution &); template<typename CharT, typename Traits> (, lognormal_distribution &); (lognormal_distribution &, lognormal_distribution &); (lognormal_distribution &, lognormal_distribution &); };
Instantiations of class template lognormal_distribution model a random distribution . Such a distribution produces random numbers with for x > 0.
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Warning |
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This distribution has been updated to match the C++ standard. Its behavior has changed from the original boost::lognormal_distribution. A backwards compatible version is provided in namespace boost. |
lognormal_distribution
public
construct/copy/destruct( m = , s = );
Constructs a lognormal_distribution
. m
and s
are the parameters of the distribution.
(param_type & param);
Constructs a lognormal_distribution
from its parameters.
lognormal_distribution
public member functions() ;
Returns the m parameter of the distribution.
() ;
Returns the s parameter of the distribution.
() ;
Returns the smallest value that the distribution can produce.
() ;
Returns the largest value that the distribution can produce.
param_type () ;
Returns the parameters of the distribution.
(param_type & param);
Sets the parameters of the distribution.
();
Effects: Subsequent uses of the distribution do not depend on values produced by any engine prior to invoking reset.
template<typename Engine> ( eng);
Returns a random variate distributed according to the lognormal distribution.
template<typename Engine> ( eng, param_type & param);
Returns a random variate distributed according to the lognormal distribution with parameters specified by param.
lognormal_distribution
friend functionstemplate<typename CharT, typename Traits> ( os, lognormal_distribution & ld);
Writes the distribution to a std::ostream
.
template<typename CharT, typename Traits> ( is, lognormal_distribution & ld);
Reads the distribution from a std::istream
.
(lognormal_distribution & lhs, lognormal_distribution & rhs);
Returns true if the two distributions will produce identical sequences of values given equal generators.
(lognormal_distribution & lhs, lognormal_distribution & rhs);
Returns true if the two distributions may produce different sequences of values given equal generators.