std::negative_binomial_distribution
Da cppreference.com
 |
This page has been machine-translated from the English version of the wiki using Google Translate.
The translation may contain errors and awkward wording. Hover over text to see the original version. You can help to fix errors and improve the translation. For instructions click here. |
| Definido no cabeçalho <random>
|
||
| template< class IntType = int > class negative_binomial_distribution; |
(desde C++11) | |
Produz aleatória não negativa i valores inteiros, distribuídos de acordo com a função de probabilidade discreta:
Original:
Produces random non-negative integer values i, distributed according to discrete probability function:
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
You can help to correct and verify the translation. Click here for instructions.
- P(i|k,p) =⎛
⎜
⎝k + i − 1
i⎞
⎟
⎠ · pk
· (1 − p)i
O valor representa o número de falhas em uma série de independentes sim / não ensaios (cada sucede com p probabilidade), antes mesmo sucessos k ocorrer.
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.
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
You can help to correct and verify the translation. Click here for instructions.
[editar] Tipos de membro
| Tipo de membro
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
|
IntType |
param_type
|
o tipo do conjunto de parâmetros, não especificado
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] Funções de membro
| constrói nova distribuição 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. (função pública membro) | |
| redefine o estado interno da distribuição 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. (função pública membro) | |
Original: Generation The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. | |
| gera o próximo número aleatório na distribuição 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. (função pública membro) | |
Original: Characteristics The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. | |
| retorna o parâmetro de distribuição k (número de falhas de julgamento) 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. (função pública membro) | |
| retorna o parâmetro de distribuição p (probabilidade de um true geração julgamento) 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. (função pública membro) | |
| obtém ou define o objeto de parâmetro de distribuição 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. (função pública membro) | |
| retorna o valor mínimo potencialmente gerado 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. (função pública membro) | |
| retorna o valor máximo potencialmente gerado 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. (função pública membro) | |
[editar] Não-membros funções
| compara dois objetos de distribuição 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. (função) | |
| executa fluxo de entrada e saída em pseudo-aleatório distribuição de números 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. (função) | |
[editar] Exemplo
#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'; } }
Saída:
0 *********************** 1 ***************************** 2 ********************** 3 ************* 4 ****** 5 *** 6 * 7 8 9 10 11
[editar] Links externos
Weisstein, Eric W. "Negative Binomial Distribution." De MathWorld - Um recurso Web Wolfram.
Original:
Weisstein, Eric W. "Negative Binomial Distribution." From MathWorld--A Wolfram Web Resource.
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
You can help to correct and verify the translation. Click here for instructions.
