std::piecewise_constant_distribution
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| Definido no cabeçalho <random>
|
||
| template< class RealType = double > class piecewise_constant_distribution; |
(desde C++11) | |
std::piecewise_constant_distribution produz aleatórios números de ponto flutuante, que são uniformemente distribuídos dentro de cada um dos subintervalos [bi, b
i+1) vários, cada um com seu próprio peso w
i. O conjunto de limites de intervalo e o conjunto de pesos são os parâmetros desta distribuição.
Original:
std::piecewise_constant_distribution produces random floating-point numbers, which are uniformly distributed within each of the several subintervals [bi, b
i+1), each with its own weight w
i. The set of interval boundaries and the set of weights are the parameters of this distribution.
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You can help to correct and verify the translation. Click here for instructions.
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A densidade de probabilidade para qualquer b
i≤x<b
i+1 é None
. onde S é a soma de todos os pesos.
i≤x<b
i+1 é None
| w k |
| S (b i+1 - b i) |
Original:
The probability density for any b
i≤x<b
i+1 is None
. where S is the sum of all weights.
i≤x<b
i+1 is None
| w k |
| S (b i+1 - b i) |
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
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[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
|
RealType |
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. | |
| obtém a lista de limites de intervalo Original: obtains the list of interval boundaries 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 a lista de densidades de probabilidade Original: obtains the list of probability densities 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 <string> #include <map> #include <random> int main() { std::random_device rd; std::mt19937 gen(rd()); // 50% of the time, generate a random number between 0 and 1 // 50% of the time, generate a random number between 10 and 15 std::vector<double> i{0, 1, 10, 15}; std::vector<double> w{ 1, 0, 1}; std::piecewise_constant_distribution<> d(i.begin(), i.end(), w.begin()); 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 ************************************************** 10 ********** 11 ********* 12 ********* 13 ********** 14 *********
