Espaces de noms
Variantes
Affichages
Actions

std::piecewise_linear_distribution

De cppreference.com
< cpp‎ | numeric‎ | random

 
 
Bibliothèque Numerics
Fonctions mathématiques courantes
Virgule flottante environnement
Nombres complexes
Tableaux numériques
La génération de nombres pseudo-aléatoires
Moment de la compilation arithmétique rationnelle (C++11)
Génériques des opérations numériques
Original:
Generic numeric operations
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
iota (C++11)
accumulate
inner_product
adjacent_difference
partial_sum
 
La génération de nombres pseudo-aléatoires
Les moteurs et les adaptateurs de moteur
Original:
Engines and engine adaptors
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
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)
Générateurs
Original:
Generators
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
random_device (C++11)
Les distributions
Original:
Distributions
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
Distributions uniformes
Original:
Uniform distributions
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
uniform_int_distribution (C++11)
uniform_real_distribution (C++11)
generate_canonical (C++11)
Distributions de Bernoulli
Original:
Bernoulli distributions
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
bernoulli_distribution (C++11)
binomial_distribution (C++11)
negative_binomial_distribution (C++11)
geometric_distribution (C++11)
Distributions de Poisson
Original:
Poisson distributions
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
poisson_distribution (C++11)
exponential_distribution (C++11)
gamma_distribution (C++11)
weibull_distribution (C++11)
extreme_value_distribution (C++11)
Les distributions normales
Original:
Normal distributions
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
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)
Distributions d'échantillonnage
Original:
Sampling distributions
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
discrete_distribution (C++11)
piecewise_constant_distribution (C++11)
piecewise_linear_distribution (C++11)
Séquences de semences
Original:
Seed Sequences
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
seed_seq (C++11)
Bibliothèque C
Original:
C library
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
rand
srand
RAND_MAX
 
std::piecewise_linear_distribution
Les fonctions membres
Original:
Member functions
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
piecewise_linear_distribution::piecewise_linear_distribution
piecewise_linear_distribution::reset
Génération
Original:
Generation
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
piecewise_linear_distribution::operator()
Caractéristiques
Original:
Characteristics
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
piecewise_linear_distribution::param
piecewise_linear_distribution::min
piecewise_linear_distribution::max
Tiers fonctions
Original:
Non-member functions
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
operator==
operator!=
operator<<
operator>>
 
Defined in header <random>
template< class RealType = double >
class piecewise_linear_distribution;
(depuis C++11)
std::piecewise_linear_distribution produit aléatoires nombres à virgule flottante, qui sont réparties selon une fonction de densité de probabilité linéaire à l'intérieur de chacun des sous-intervalles de plusieurs [b
i
, b
i+1
)
. La distribution est telle que la densité de probabilité à chaque intervalle de frontière est exactement la valeur prédéfinie p
i
.
Original:
std::piecewise_linear_distribution produces random floating-point numbers, which are distributed according to a linear probability density function within each of the several subintervals [b
i
, b
i+1
)
. The distribution is such that the probability density at each interval boundary is exactly the predefined value p
i
.
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
La densité de probabilité pour chaque b
i
≤x<b
i+1
est p
i
b
i+1
-x
b
i+1
-b
i
+ p
i+1
x-b
i
b
i+1
-b
i
, où les densités de probabilité dans les limites d'intervalle sont calculées à p
k
w
k
/S
S est la somme de tous None
1
2
(w
k
+w
k+1
)(b
k+1
−b
k
)
.
Original:
The probability density for any b
i
≤x<b
i+1
is p
i
b
i+1
-x
b
i+1
-b
i
+ p
i+1
x-b
i
b
i+1
-b
i
, where probability densities at interval boundaries p
k
are calculated as w
k
/S
where S is the sum of all None
1
2
(w
k
+w
k+1
)(b
k+1
−b
k
)
.
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
L'ensemble de l'intervalle b
i
frontières et l'ensemble de poids aux limites w
i
sont les paramètres de cette distribution .
Original:
The set of interval boundaries b
i
and the set of weights at boundaries w
i
are the parameters of this distribution.
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

Sommaire

[modifier] Types de membres

Type du membre Définition
result_type RealType
param_type
le type du jeu de paramètres, sans précision
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.

[modifier] Fonctions membres

construit distribution
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.

(fonction membre publique) [edit]
réinitialise l'état interne de la distribution
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.

(fonction membre publique) [edit]
Génération
Original:
Generation
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
génère le nombre aléatoire suivant dans la distribution
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.

(fonction membre publique) [edit]
Caractéristiques
Original:
Characteristics
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
obtient la liste des limites d'intervalles
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.

(fonction membre publique) [edit]
obtient la liste des densités de probabilité au niveau des limites d'intervalle
Original:
obtains the list of probability densities at interval boundaries
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

(fonction membre publique) [edit]
obtient ou définit l'objet de paramètre de distribution
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.

(fonction membre publique) [edit]
renvoie la valeur minimale potentiellement générées
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.

(fonction membre publique) [edit]
renvoie la valeur maximale potentiellement générées
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.

(fonction membre publique) [edit]

[modifier] Fonctions annexes

compare deux objets de distribution
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.

(fonction) [edit]
effectue flux d'entrée et de sortie sur la distribution de nombre pseudo-aléatoire
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.

(fonction) [edit]

[modifier] Exemple

#include <iostream>
#include <iomanip>
#include <string>
#include <map>
#include <random>
 
int main()
{
    std::random_device rd;
    std::mt19937 gen(rd());
    // increase the probability from 0 to 5
    // remain flat from 5 to 10
    // decrease from 10 to 15 at the same rate
    std::vector<double> i{0, 5, 10, 15};
    std::vector<double> w{0, 1,   1, 0};
    std::piecewise_linear_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 << std::setw(2) << p.first << ' ' << std::string(p.second/100,
    }
}

Résultat :

0 *
 1 ***
 2 ****
 3 ******
 4 *********
 5 *********
 6 *********
 7 **********
 8 *********
 9 **********
10 *********
11 *******
12 ****
13 ***
14 *