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      std::geometric_distribution

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      < cpp‎ | numeric‎ | random

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      C++
       
      Biblioteca numéricos
      Funções matemáticas comuns
      De ponto flutuante ambiente
      Números complexos
      Matrizes numéricas
      Pseudo-aleatório de geração de números
      Tempo de compilação aritmética racional(C++11)
      Genéricos operações numéricas
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      Generic numeric operations
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      (C++11)
       
      Pseudo-aleatório de geração de números
      Motores e adaptadores de motor
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      Engines and engine adaptors
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      (C++11)
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      (C++11)
      Geradores
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      Generators
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      (C++11)
      Distribuições
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      Distributions
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      Distribuições uniformes
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      Uniform distributions
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      (C++11)
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      (C++11)
      Distribuições de Bernoulli
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      Bernoulli distributions
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      (C++11)
      (C++11)
      (C++11)
      geometric_distribution
      (C++11)
      Distribuições de Poisson
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      Poisson distributions
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      (C++11)
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      Distribuições normais
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      Normal distributions
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      (C++11)
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      Distribuições de amostragem
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      Sampling distributions
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      (C++11)
      (C++11)
      (C++11)
      Seqüências de sementes
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      Seed Sequences
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      C biblioteca
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      C library
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      std::geometric_distribution
      Funções de membro
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      Member functions
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      geometric_distribution::geometric_distribution
      geometric_distribution::reset
      Geração
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      Generation
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      geometric_distribution::operator()
      Características
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      Characteristics
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      geometric_distribution::p
      geometric_distribution::param
      geometric_distribution::min
      geometric_distribution::max
      Não-membros funções
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      Non-member functions
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      Definido no cabeçalho <random>
      template<class IntType =int>
      class geometric_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:
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      P(i|p) = p · (1 − p)i
      O valor representa o número de sim / não ensaios (cada sucesso com p probabilidade) que são necessários para obter um único sucesso.
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      The value represents the number of yes/no trials (each succeeding with probability p) which are necessary to obtain a single success.
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      std::geometric_distribution<>(p) é exatamente equivalente a std::negative_binomial_distribution<>(1, p). É também o homólogo discreto de std::exponential_distribution.
      Original:
      std::geometric_distribution<>(p) is exactly equivalent to std::negative_binomial_distribution<>(1, p). It is also the discrete counterpart of std::exponential_distribution.
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      Índice

      [editar]Tipos de membro

      Tipo de membro
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      Member type
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      		 Definition
      result_typeIntType
      param_type
      o tipo do conjunto de parâmetros, não especificado
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      the type of the parameter set, unspecified
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      [editar]Funções de membro

      constrói nova distribuição
      Original:
      constructs new distribution
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      (função pública membro)[edit]
      redefine o estado interno da distribuição
      Original:
      resets the internal state of the distribution
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      (função pública membro)[edit]
      Geração
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      Generation
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      gera o próximo número aleatório na distribuição
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      generates the next random number in the distribution
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      (função pública membro)[edit]
      Características
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      Characteristics
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      retorna o parâmetro de distribuição p (probabilidade de um true geração julgamento)
      Original:
      returns the p distribution parameter (probability of a trial generating true)
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      (função pública membro)[edit]
      obtém ou define o objeto de parâmetro de distribuição
      Original:
      gets or sets the distribution parameter object
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      (função pública membro)[edit]
      retorna o valor mínimo potencialmente gerado
      Original:
      returns the minimum potentially generated value
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      (função pública membro)[edit]
      retorna o valor máximo potencialmente gerado
      Original:
      returns the maximum potentially generated value
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      (função pública membro)[edit]

      [editar]Não-membros funções

      compara dois objetos de distribuição
      Original:
      compares two distribution objects
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      (função)[edit]
      executa fluxo de entrada e saída em pseudo-aleatório distribuição de números
      Original:
      performs stream input and output on pseudo-random number distribution
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      (função)[edit]

      [editar]Exemplo

      geometric_distribution <> (0,5) é o padrão e representa o número de moedas que são necessários para obter cabeças
      Original:
      geometric_distribution<>(0.5) is the default and represents the number of coin tosses that are required to get heads
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      #include <iostream>#include <iomanip>#include <string>#include <map>#include <random>int main(){ std::random_device rd;std::mt19937 gen(rd());   std::geometric_distribution<> d;// same as std::negative_binomial_distribution<> d(1, 0.5);   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. "Geometric Distribution." De MathWorld - Um recurso Web Wolfram.
      Original:
      Weisstein, Eric W. "Geometric Distribution." From MathWorld--A Wolfram Web Resource.
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      Obtida de "https://pt.cppreference.com/mwiki/index.php?title=cpp/numeric/random/geometric_distribution&oldid=21388"
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