.TH "std::normal_distribution< _RealType >" 3cxx "Thu Aug 2 2012" "libstdc++" \" -*- nroff -*-
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.SH NAME
std::normal_distribution< _RealType > \- 
.SH SYNOPSIS
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.PP
.SS "Public Types"

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

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.RI "_RealType \fBmean\fP () const "
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.RI "\fBnormal_distribution\fP (const result_type &__mean=result_type(0), const result_type &__sigma=result_type(1))"
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.RI "template<class _UniformRandomNumberGenerator > result_type \fBoperator()\fP (_UniformRandomNumberGenerator &__urng)"
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.RI "void \fBreset\fP ()"
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.RI "_RealType \fBsigma\fP () const "
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.SS "Friends"

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.RI "template<typename _RealType1 , typename _CharT , typename _Traits > \fBstd::basic_ostream\fP< _CharT, 
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_Traits > & \fBoperator<<\fP (\fBstd::basic_ostream\fP< _CharT, _Traits > &__os, const \fBnormal_distribution\fP< _RealType1 > &__x)"
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.RI "template<typename _RealType1 , typename _CharT , typename _Traits > \fBstd::basic_istream\fP< _CharT, 
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_Traits > & \fBoperator>>\fP (\fBstd::basic_istream\fP< _CharT, _Traits > &__is, \fBnormal_distribution\fP< _RealType1 > &__x)"
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.SH "Detailed Description"
.PP 

.SS "template<typename _RealType = double>class std::normal_distribution< _RealType >"
A normal continuous distribution for random numbers\&. 

The formula for the normal probability mass function is $ p(x) = \frac{1}{\sigma \sqrt{2 \pi}} e^{- \frac{{x - mean}^ {2}}{2 \sigma ^ {2}} } $\&. 
.PP
Definition at line 2231 of file tr1_impl/random\&.
.SH "Constructor & Destructor Documentation"
.PP 
.SS "template<typename _RealType = double> \fBstd::normal_distribution\fP< _RealType >::\fBnormal_distribution\fP (const result_type &__mean = \fCresult_type(0)\fP, const result_type &__sigma = \fCresult_type(1)\fP)\fC [inline]\fP, \fC [explicit]\fP"
Constructs a normal distribution with parameters $ mean $ and $ \sigma $\&. 
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Definition at line 2244 of file tr1_impl/random\&.
.SH "Member Function Documentation"
.PP 
.SS "template<typename _RealType = double> _RealType \fBstd::normal_distribution\fP< _RealType >::mean () const\fC [inline]\fP"
Gets the mean of the distribution\&. 
.PP
Definition at line 2255 of file tr1_impl/random\&.
.SS "template<typename _RealType > template<class _UniformRandomNumberGenerator > \fBnormal_distribution\fP< _RealType >::result_type \fBstd::normal_distribution\fP< _RealType >::operator() (_UniformRandomNumberGenerator &__urng)"
Polar method due to Marsaglia\&.
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Devroye, L\&. 'Non-Uniform Random Variates Generation\&.' Springer-Verlag, New York, 1986, Ch\&. V, Sect\&. 4\&.4\&. 
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Definition at line 1390 of file random\&.tcc\&.
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References std::log(), and std::sqrt()\&.
.SS "template<typename _RealType = double> void \fBstd::normal_distribution\fP< _RealType >::reset ()\fC [inline]\fP"
Resets the distribution\&. 
.PP
Definition at line 2269 of file tr1_impl/random\&.
.SS "template<typename _RealType = double> _RealType \fBstd::normal_distribution\fP< _RealType >::sigma () const\fC [inline]\fP"
Gets the $ \sigma $ of the distribution\&. 
.PP
Definition at line 2262 of file tr1_impl/random\&.
.SH "Friends And Related Function Documentation"
.PP 
.SS "template<typename _RealType = double> template<typename _RealType1 , typename _CharT , typename _Traits > \fBstd::basic_ostream\fP<_CharT, _Traits>& operator<< (\fBstd::basic_ostream\fP< _CharT, _Traits > &__os, const \fBnormal_distribution\fP< _RealType1 > &__x)\fC [friend]\fP"
Inserts a normal_distribution random number distribution \fC__x\fP into the output stream \fC__os\fP\&.
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\fBParameters:\fP
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\fI__os\fP An output stream\&. 
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\fI__x\fP A normal_distribution random number distribution\&.
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\fBReturns:\fP
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The output stream with the state of \fC__x\fP inserted or in an error state\&. 
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.SS "template<typename _RealType = double> template<typename _RealType1 , typename _CharT , typename _Traits > \fBstd::basic_istream\fP<_CharT, _Traits>& operator>> (\fBstd::basic_istream\fP< _CharT, _Traits > &__is, \fBnormal_distribution\fP< _RealType1 > &__x)\fC [friend]\fP"
Extracts a normal_distribution random number distribution \fC__x\fP from the input stream \fC__is\fP\&.
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\fBParameters:\fP
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\fI__is\fP An input stream\&. 
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\fI__x\fP A normal_distribution random number generator engine\&.
.RE
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\fBReturns:\fP
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The input stream with \fC__x\fP extracted or in an error state\&. 
.RE
.PP


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