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boost::random::lognormal_distribution
// In header: <boost/random/lognormal_distribution.hpp> template<typename RealType = double> class lognormal_distribution { public: // types typedef normal_distribution< RealType >:: ; typedef RealType ; // member classes/structs/unions class param_type { public: // types typedef lognormal_distribution ; // construct/copy/destruct (RealType = , RealType = ); // public member functions RealType () ; RealType () ; // friend functions template<typename CharT, typename Traits> CharT, Traits > & (CharT, Traits > &, const param_type &); template<typename CharT, typename Traits> CharT, Traits > & (CharT, Traits > &, const param_type &); bool (const param_type &, const param_type &); bool (const param_type &, const param_type &); }; // construct/copy/destruct (RealType = , RealType = ); (const param_type &); // public member functions RealType () ; RealType () ; RealType () ; RealType () ; param_type () ; void (const param_type &); void (); template<typename Engine> (Engine &); template<typename Engine> (Engine &, const param_type &); // friend functions template<typename CharT, typename Traits> CharT, Traits > & (CharT, Traits > &, const lognormal_distribution &); template<typename CharT, typename Traits> CharT, Traits > & (CharT, Traits > &, const lognormal_distribution &); bool (const lognormal_distribution &, const lognormal_distribution &); bool (const lognormal_distribution &, const 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(RealType m = , RealType s = );
Constructs a lognormal_distribution
. m
and s
are the parameters of the distribution.
(const param_type & param);
Constructs a lognormal_distribution
from its parameters.
lognormal_distribution
public member functionsRealType () ;
Returns the m parameter of the distribution.
RealType () ;
Returns the s parameter of the distribution.
RealType () ;
Returns the smallest value that the distribution can produce.
RealType () ;
Returns the largest value that the distribution can produce.
param_type () ;
Returns the parameters of the distribution.
void (const param_type & param);
Sets the parameters of the distribution.
void ();
Effects: Subsequent uses of the distribution do not depend on values produced by any engine prior to invoking reset.
template<typename Engine> (Engine & eng);
Returns a random variate distributed according to the lognormal distribution.
template<typename Engine> (Engine & eng, const 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> CharT, Traits > & (CharT, Traits > & os, const lognormal_distribution & ld);
Writes the distribution to a std::ostream
.
template<typename CharT, typename Traits> CharT, Traits > & (CharT, Traits > & is, const lognormal_distribution & ld);
Reads the distribution from a std::istream
.
bool (const lognormal_distribution & lhs, const lognormal_distribution & rhs);
Returns true if the two distributions will produce identical sequences of values given equal generators.
bool (const lognormal_distribution & lhs, const lognormal_distribution & rhs);
Returns true if the two distributions may produce different sequences of values given equal generators.