std::negative_binomial_distribution
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| Defined in header <random>
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| template< class IntType = int > class negative_binomial_distribution; |
(ya que C + +11) | |
Produce aleatorio no negativo i valores enteros, distribuidos de acuerdo con función de probabilidad discreta:
Original:
Produces random non-negative integer values i, distributed according to discrete probability function:
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- P(i|k,p) =⎛
⎜
⎝k + i − 1
i⎞
⎟
⎠ · pk
· (1 − p)i
El valor representa el número de fallos en una serie de independientes sí / no hay ensayos (cada uno tiene éxito con p probabilidad), antes de ocurrir exactamente éxitos k .
Original:
The value represents the number of failures in a series of independent yes/no trials (each succeeds with probability p), before exactly k successes occur.
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[editar] Tipos de miembros
| Miembro de tipo
Original: Member type The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. |
Definition |
result_type
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IntType |
param_type
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el tipo del conjunto de parámetros, sin especificar
Original: the type of the parameter set, unspecified The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. |
[editar] Las funciones miembro
| construye nueva distribución Original: constructs new distribution The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (miembro público función) | |
| restablece el estado interno de la distribución Original: resets the internal state of the distribution The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (miembro público función) | |
Original: Generation The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. | |
| genera el siguiente número aleatorio en la distribución Original: generates the next random number in the distribution The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (miembro público función) | |
Original: Characteristics The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. | |
| devuelve el parámetro k distribución (número de errores de juicio) Original: returns the k distribution parameter (number of trial failures) The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (miembro público función) | |
| devuelve el parámetro p de distribución (probabilidad de un true generadora de ensayo) Original: returns the p distribution parameter (probability of a trial generating true) The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (miembro público función) | |
| obtiene o establece el objeto de parámetro de distribución Original: gets or sets the distribution parameter object The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (miembro público función) | |
| devuelve el valor mínimo potencialmente generado Original: returns the minimum potentially generated value The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (miembro público función) | |
| devuelve el valor máximo potencialmente generado Original: returns the maximum potentially generated value The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (miembro público función) | |
[editar] Terceros funciones
| compara dos objetos de distribución Original: compares two distribution objects The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (función) | |
| realiza flujo de entrada y salida en la distribución de números pseudo-aleatorios Original: performs stream input and output on pseudo-random number distribution The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (función) | |
[editar] Ejemplo
#include <iostream> #include <iomanip> #include <string> #include <map> #include <random> int main() { std::random_device rd; std::mt19937 gen(rd()); // Pat goes door-to-door selling cookies // At each house, there's a 75% chance that she sells one box // how many times will she be turned away before selling 5 boxes? std::negative_binomial_distribution<> d(5, 0.75); std::map<int, int> hist; for(int n=0; n<10000; ++n) { ++hist[d(gen)]; } for(auto p : hist) { std::cout << p.first << ' ' << std::string(p.second/100, '*') << '\n'; } }
Output:
0 *********************** 1 ***************************** 2 ********************** 3 ************* 4 ****** 5 *** 6 * 7 8 9 10 11
[editar] Enlaces externos
Weisstein, Eric W. "Negative Binomial Distribution." De MathWorld - Un recurso del Web Wolfram .
Original:
Weisstein, Eric W. "Negative Binomial Distribution." From MathWorld--A Wolfram Web Resource.
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