.TH "std::exponential_distribution< _RealType >" 3cxx "libstdc++" \" -*- nroff -*-
.ad l
.nh
.SH NAME
std::exponential_distribution< _RealType > \- An exponential continuous distribution for random numbers\&.  

.SH SYNOPSIS
.br
.PP
.PP
\fC#include <random\&.h>\fP
.SS "Classes"

.in +1c
.ti -1c
.RI "struct \fBparam_type\fP"
.br
.in -1c
.SS "Public Types"

.in +1c
.ti -1c
.RI "\fBtypedef\fP _RealType \fBresult_type\fP"
.br
.in -1c
.SS "Public Member Functions"

.in +1c
.ti -1c
.RI "\fBexponential_distribution\fP ()"
.br
.RI "Constructs an exponential distribution with inverse scale parameter 1\&.0\&. "
.ti -1c
.RI "\fBexponential_distribution\fP (_RealType \fB__lambda\fP)"
.br
.RI "Constructs an exponential distribution with inverse scale parameter $\lambda$\&. "
.ti -1c
.RI "\fBexponential_distribution\fP (\fBconst\fP \fBparam_type\fP &__p)"
.br
.ti -1c
.RI "template<\fBtypename\fP \fB_ForwardIterator\fP , \fBtypename\fP \fB_UniformRandomNumberGenerator\fP > \fBvoid\fP \fB__generate\fP (\fB_ForwardIterator\fP __f, \fB_ForwardIterator\fP __t, \fB_UniformRandomNumberGenerator\fP &\fB__urng\fP)"
.br
.ti -1c
.RI "template<\fBtypename\fP \fB_ForwardIterator\fP , \fBtypename\fP \fB_UniformRandomNumberGenerator\fP > \fBvoid\fP \fB__generate\fP (\fB_ForwardIterator\fP __f, \fB_ForwardIterator\fP __t, \fB_UniformRandomNumberGenerator\fP &\fB__urng\fP, \fBconst\fP \fBparam_type\fP &__p)"
.br
.ti -1c
.RI "template<\fBtypename\fP \fB_UniformRandomNumberGenerator\fP > \fBvoid\fP \fB__generate\fP (\fBresult_type\fP *__f, \fBresult_type\fP *__t, \fB_UniformRandomNumberGenerator\fP &\fB__urng\fP, \fBconst\fP \fBparam_type\fP &__p)"
.br
.ti -1c
.RI "_RealType \fBlambda\fP () \fBconst\fP"
.br
.RI "Returns the inverse scale parameter of the distribution\&. "
.ti -1c
.RI "\fBresult_type\fP \fBmax\fP () \fBconst\fP"
.br
.RI "Returns the least upper bound value of the distribution\&. "
.ti -1c
.RI "\fBresult_type\fP \fBmin\fP () \fBconst\fP"
.br
.RI "Returns the greatest lower bound value of the distribution\&. "
.ti -1c
.RI "template<\fBtypename\fP \fB_UniformRandomNumberGenerator\fP > \fBresult_type\fP \fBoperator()\fP (\fB_UniformRandomNumberGenerator\fP &\fB__urng\fP)"
.br
.RI "Generating functions\&. "
.ti -1c
.RI "template<\fBtypename\fP \fB_UniformRandomNumberGenerator\fP > \fBresult_type\fP \fBoperator()\fP (\fB_UniformRandomNumberGenerator\fP &\fB__urng\fP, \fBconst\fP \fBparam_type\fP &__p)"
.br
.ti -1c
.RI "\fBparam_type\fP \fBparam\fP () \fBconst\fP"
.br
.RI "Returns the parameter set of the distribution\&. "
.ti -1c
.RI "\fBvoid\fP \fBparam\fP (\fBconst\fP \fBparam_type\fP &\fB__param\fP)"
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.RI "Sets the parameter set of the distribution\&. "
.ti -1c
.RI "\fBvoid\fP \fBreset\fP ()"
.br
.RI "Resets the distribution state\&. "
.in -1c
.SS "Friends"

.in +1c
.ti -1c
.RI "bool \fBoperator==\fP (\fBconst\fP \fBexponential_distribution\fP &\fB__d1\fP, \fBconst\fP \fBexponential_distribution\fP &\fB__d2\fP)"
.br
.RI "Return true if two exponential distributions have the same parameters\&. "
.in -1c
.SH "Detailed Description"
.PP 

.SS "template<\fBtypename\fP _RealType = double>
.br
class std::exponential_distribution< _RealType >"An exponential continuous distribution for random numbers\&. 

The formula for the exponential probability density function is $p(x|\lambda) = \lambda e^{-\lambda x}$\&.
.PP
Mean$\frac{1}{\lambda}$ Median$\frac{\ln 2}{\lambda}$ Mode$zero$ Range$[0, \infty]$ Standard Deviation$\frac{1}{\lambda}$ 
.SH "Member Typedef Documentation"
.PP 
.SS "template<\fBtypename\fP _RealType  = double> \fBtypedef\fP _RealType \fBstd::exponential_distribution\fP< _RealType >::result_type"
The type of the range of the distribution\&. 
.SH "Constructor & Destructor Documentation"
.PP 
.SS "template<\fBtypename\fP _RealType  = double> \fBstd::exponential_distribution\fP< _RealType >::exponential_distribution ()\fC [inline]\fP"

.PP
Constructs an exponential distribution with inverse scale parameter 1\&.0\&. 
.SS "template<\fBtypename\fP _RealType  = double> \fBstd::exponential_distribution\fP< _RealType >::exponential_distribution (_RealType __lambda)\fC [inline]\fP, \fC [explicit]\fP"

.PP
Constructs an exponential distribution with inverse scale parameter $\lambda$\&. 
.SH "Member Function Documentation"
.PP 
.SS "template<\fBtypename\fP _RealType  = double> _RealType \fBstd::exponential_distribution\fP< _RealType >::lambda () const\fC [inline]\fP"

.PP
Returns the inverse scale parameter of the distribution\&. 
.SS "template<\fBtypename\fP _RealType  = double> \fBresult_type\fP \fBstd::exponential_distribution\fP< _RealType >::max () const\fC [inline]\fP"

.PP
Returns the least upper bound value of the distribution\&. 
.PP
References \fBstd::numeric_limits< _Tp >::max()\fP\&.
.SS "template<\fBtypename\fP _RealType  = double> \fBresult_type\fP \fBstd::exponential_distribution\fP< _RealType >::min () const\fC [inline]\fP"

.PP
Returns the greatest lower bound value of the distribution\&. 
.SS "template<\fBtypename\fP _RealType  = double> template<\fBtypename\fP \fB_UniformRandomNumberGenerator\fP > \fBresult_type\fP \fBstd::exponential_distribution\fP< _RealType >::operator() (\fB_UniformRandomNumberGenerator\fP & __urng)\fC [inline]\fP"

.PP
Generating functions\&. 
.PP
References \fBstd::exponential_distribution< _RealType >::operator()()\fP\&.
.PP
Referenced by \fBstd::exponential_distribution< _RealType >::operator()()\fP\&.
.SS "template<\fBtypename\fP _RealType  = double> \fBparam_type\fP \fBstd::exponential_distribution\fP< _RealType >::param () const\fC [inline]\fP"

.PP
Returns the parameter set of the distribution\&. 
.SS "template<\fBtypename\fP _RealType  = double> \fBvoid\fP \fBstd::exponential_distribution\fP< _RealType >::param (\fBconst\fP \fBparam_type\fP & __param)\fC [inline]\fP"

.PP
Sets the parameter set of the distribution\&. 
.PP
\fBParameters\fP
.RS 4
\fI__param\fP The new parameter set of the distribution\&. 
.RE
.PP

.SS "template<\fBtypename\fP _RealType  = double> \fBvoid\fP \fBstd::exponential_distribution\fP< _RealType >::reset ()\fC [inline]\fP"

.PP
Resets the distribution state\&. Has no effect on exponential distributions\&. 
.SH "Friends And Related Symbol Documentation"
.PP 
.SS "template<\fBtypename\fP _RealType  = double> bool \fBoperator\fP== (\fBconst\fP \fBexponential_distribution\fP< _RealType > & __d1, \fBconst\fP \fBexponential_distribution\fP< _RealType > & __d2)\fC [friend]\fP"

.PP
Return true if two exponential distributions have the same parameters\&. 

.SH "Author"
.PP 
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