.TH "std::exponential_distribution< _RealType >" 3cxx "Wed Apr 11 2018" "libstdc++" \" -*- nroff -*-
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.SH NAME
std::exponential_distribution< _RealType >
.SH SYNOPSIS
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.PP
.SS "Classes"

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.RI "struct \fBparam_type\fP"
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.SS "Public Types"

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.RI "typedef _RealType \fBresult_type\fP"
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.SS "Public Member Functions"

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.RI "\fBexponential_distribution\fP (const \fBresult_type\fP &__lambda=\fBresult_type\fP(1))"
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.RI "\fBexponential_distribution\fP (const \fBparam_type\fP &__p)"
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.RI "template<typename _ForwardIterator , typename _UniformRandomNumberGenerator > void \fB__generate\fP (_ForwardIterator __f, _ForwardIterator __t, _UniformRandomNumberGenerator &__urng)"
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.RI "template<typename _ForwardIterator , typename _UniformRandomNumberGenerator > void \fB__generate\fP (_ForwardIterator __f, _ForwardIterator __t, _UniformRandomNumberGenerator &__urng, const \fBparam_type\fP &__p)"
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.RI "template<typename _UniformRandomNumberGenerator > void \fB__generate\fP (\fBresult_type\fP *__f, \fBresult_type\fP *__t, _UniformRandomNumberGenerator &__urng, const \fBparam_type\fP &__p)"
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.RI "_RealType \fBlambda\fP () const"
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.RI "\fBresult_type\fP \fBmax\fP () const"
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.RI "\fBresult_type\fP \fBmin\fP () const"
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.RI "template<typename _UniformRandomNumberGenerator > \fBresult_type\fP \fBoperator()\fP (_UniformRandomNumberGenerator &__urng)"
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.RI "template<typename _UniformRandomNumberGenerator > \fBresult_type\fP \fBoperator()\fP (_UniformRandomNumberGenerator &__urng, const \fBparam_type\fP &__p)"
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.RI "\fBparam_type\fP \fBparam\fP () const"
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.RI "void \fBparam\fP (const \fBparam_type\fP &__param)"
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.RI "void \fBreset\fP ()"
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.SS "Friends"

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.RI "bool \fBoperator==\fP (const \fBexponential_distribution\fP &__d1, const \fBexponential_distribution\fP &__d2)"
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.SH "Detailed Description"
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.SS "template<typename _RealType = double>
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class std::exponential_distribution< _RealType >"
An exponential continuous distribution for random numbers\&. 

The formula for the exponential probability density function is $p(x|\lambda) = \lambda e^{-\lambda x}$\&.
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Distribution StatisticsMean$\frac{1}{\lambda}$ Median$\frac{\ln 2}{\lambda}$ Mode$zero$ Range$[0, \infty]$ Standard Deviation$\frac{1}{\lambda}$ 
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Definition at line 4481 of file random\&.h\&.
.SH "Member Typedef Documentation"
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.SS "template<typename _RealType = double> typedef _RealType \fBstd::exponential_distribution\fP< _RealType >::\fBresult_type\fP"
The type of the range of the distribution\&. 
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Definition at line 4484 of file random\&.h\&.
.SH "Constructor & Destructor Documentation"
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.SS "template<typename _RealType = double> \fBstd::exponential_distribution\fP< _RealType >::\fBexponential_distribution\fP (const \fBresult_type\fP & __lambda = \fC\fBresult_type\fP(1)\fP)\fC [inline]\fP, \fC [explicit]\fP"

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Constructs an exponential distribution with inverse scale parameter $\lambda$\&. 
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Definition at line 4519 of file random\&.h\&.
.SH "Member Function Documentation"
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.SS "template<typename _RealType = double> _RealType \fBstd::exponential_distribution\fP< _RealType >::lambda () const\fC [inline]\fP"

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Returns the inverse scale parameter of the distribution\&. 
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Definition at line 4540 of file random\&.h\&.
.SS "template<typename _RealType = double> \fBresult_type\fP \fBstd::exponential_distribution\fP< _RealType >::max () const\fC [inline]\fP"

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Returns the least upper bound value of the distribution\&. 
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Definition at line 4569 of file random\&.h\&.
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References std::numeric_limits< _Tp >::max()\&.
.SS "template<typename _RealType = double> \fBresult_type\fP \fBstd::exponential_distribution\fP< _RealType >::min () const\fC [inline]\fP"

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Returns the greatest lower bound value of the distribution\&. 
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Definition at line 4562 of file random\&.h\&.
.SS "template<typename _RealType = double> template<typename _UniformRandomNumberGenerator > \fBresult_type\fP \fBstd::exponential_distribution\fP< _RealType >::operator() (_UniformRandomNumberGenerator & __urng)\fC [inline]\fP"

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Generating functions\&. 
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Definition at line 4577 of file random\&.h\&.
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References std::log()\&.
.SS "template<typename _RealType = double> \fBparam_type\fP \fBstd::exponential_distribution\fP< _RealType >::param () const\fC [inline]\fP"

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Returns the parameter set of the distribution\&. 
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Definition at line 4547 of file random\&.h\&.
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Referenced by std::operator>>()\&.
.SS "template<typename _RealType = double> void \fBstd::exponential_distribution\fP< _RealType >::param (const \fBparam_type\fP & __param)\fC [inline]\fP"

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Sets the parameter set of the distribution\&. 
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\fBParameters:\fP
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\fI__param\fP The new parameter set of the distribution\&. 
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Definition at line 4555 of file random\&.h\&.
.SS "template<typename _RealType = double> void \fBstd::exponential_distribution\fP< _RealType >::reset ()\fC [inline]\fP"

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Resets the distribution state\&. Has no effect on exponential distributions\&. 
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Definition at line 4534 of file random\&.h\&.
.SH "Friends And Related Function Documentation"
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.SS "template<typename _RealType = double> bool operator== (const \fBexponential_distribution\fP< _RealType > & __d1, const \fBexponential_distribution\fP< _RealType > & __d2)\fC [friend]\fP"

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Return true if two exponential distributions have the same parameters\&. 
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Definition at line 4617 of file random\&.h\&.

.SH "Author"
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Generated automatically by Doxygen for libstdc++ from the source code\&.