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cpp/numeric/random/discrete distribution/probabilities: differenze tra le versioni

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Versione delle 20:59, 2 nov 2012

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C++
 
Numeri libreria
Comuni funzioni matematiche
Virgola mobile ambiente
I numeri complessi
Array numerici
Pseudo-casuale generazione
In fase di compilazione aritmetica razionale (C++11)
Generici operazioni numeriche
Original:
Generic numeric operations
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iota(C++11)
accumulate
inner_product
adjacent_difference
partial_sum
 
Pseudo-casuale generazione
Motori e adattatori del motore
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Engines and engine adaptors
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linear_congruential_engine(C++11)
mersenne_twister_engine(C++11)
subtract_with_carry_engine(C++11)
discard_block_engine(C++11)
independent_bits_engine(C++11)
shuffle_order_engine(C++11)
Generatori
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Generators
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random_device(C++11)
Distribuzioni
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Distributions
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Distribuzioni uniformi
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Uniform distributions
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uniform_int_distribution(C++11)
uniform_real_distribution(C++11)
generate_canonical(C++11)
Bernoulli distribuzioni
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Bernoulli distributions
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bernoulli_distribution(C++11)
binomial_distribution(C++11)
negative_binomial_distribution(C++11)
geometric_distribution(C++11)
Poisson distribuzioni
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Poisson distributions
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poisson_distribution(C++11)
exponential_distribution(C++11)
gamma_distribution(C++11)
weibull_distribution(C++11)
extreme_value_distribution(C++11)
Distribuzioni normali
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Normal distributions
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normal_distribution(C++11)
lognormal_distribution(C++11)
chi_squared_distribution(C++11)
cauchy_distribution(C++11)
fisher_f_distribution(C++11)
student_t_distribution(C++11)
Distribuzioni di campionamento
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Sampling distributions
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discrete_distribution(C++11)
piecewise_constant_distribution(C++11)
piecewise_linear_distribution(C++11)
Seed Sequenze
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Seed Sequences
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seed_seq(C++11)
Libreria C
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C library
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rand
srand
RAND_MAX
 
std::discrete_distribution
Membri funzioni
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Member functions
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discrete_distribution::discrete_distribution
discrete_distribution::reset
Generazione
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Generation
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discrete_distribution::operator()
Caratteristiche
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Characteristics
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discrete_distribution::probabilities
discrete_distribution::param
discrete_distribution::min
discrete_distribution::max
Non membri funzioni
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Non-member functions
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operator==
operator!=
operator<<
operator>>
 
std::vector<double> probabilities() const;
 (dal C++11)
Ottiene un std::vector<double> contenente le probabilità di ogni singolo numero intero che viene generato da questa distribuzione.
Original:
Obtains a std::vector<double> containing the individual probabilities of each integer that is generated by this distribution.
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Parametri

(Nessuno)
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(none)
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Valore di ritorno

Un oggetto di tipo std::vector<double>
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An object of type std::vector<double>
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Esempio

#include <iostream>
#include <vector>
#include <random>
int main()
{
    std::discrete_distribution<> d({40, 10, 10, 40});
    std::vector<double> p = d.probabilities();
    for(auto n : p)
        std::cout << n << ' ';
    std::cout << '\n';
}

Output: 

0.4 0.1 0.1 0.4
Estratto da "https://it.cppreference.com/mwiki/index.php?title=cpp/numeric/random/discrete_distribution/probabilities&oldid=18880"