libstdc++
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Public Types | |
typedef _RealType | input_type |
typedef _RealType | result_type |
Public Member Functions | |
exponential_distribution (const result_type &__lambda=result_type(1)) | |
_RealType | lambda () const |
template<class _UniformRandomNumberGenerator > | |
result_type | operator() (_UniformRandomNumberGenerator &__urng) |
void | reset () |
Friends | |
template<typename _RealType1 , typename _CharT , typename _Traits > | |
std::basic_ostream< _CharT, _Traits > & | operator<< (std::basic_ostream< _CharT, _Traits > &__os, const exponential_distribution< _RealType1 > &__x) |
template<typename _CharT , typename _Traits > | |
std::basic_istream< _CharT, _Traits > & | operator>> (std::basic_istream< _CharT, _Traits > &__is, exponential_distribution &__x) |
An exponential continuous distribution for random numbers.
The formula for the exponential probability mass function is
.
<table border=1 cellpadding=10 cellspacing=0> <caption align=top>Distribution Statistics</caption> <tr><td>Mean</td><td> \form#14</td></tr> <tr><td>Median</td><td> \form#15</td></tr> <tr><td>Mode</td><td> \form#16</td></tr> <tr><td>Range</td><td> \form#17</td></tr> <tr><td>Standard Deviation</td><td> \form#14</td></tr> </table>
Definition at line 2148 of file tr1_impl/random.
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inlineexplicit |
Constructs an exponential distribution with inverse scale parameter
.
Definition at line 2161 of file tr1_impl/random.
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inline |
Gets the inverse scale parameter of the distribution.
Definition at line 2171 of file tr1_impl/random.
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inline |
Resets the distribution.
Has no effect on exponential distributions.
Definition at line 2180 of file tr1_impl/random.
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friend |
Inserts a exponential_distribution random number distribution __x
into the output stream __os
.
__os | An output stream. |
__x | A exponential_distribution random number distribution. |
__x
inserted or in an error state.
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friend |
Extracts a exponential_distribution random number distribution __x
from the input stream __is
.
__is | An input stream. |
__x | A exponential_distribution random number generator engine. |
__x
extracted or in an error state. Definition at line 2214 of file tr1_impl/random.