std::normal_distribution

 

C++

Linguaggio

Concetti

Libreria di Utilità

Stringhe

Contenitori

Algoritmi

Iteratori

Libreria matematca

Input/output

Localizzazione

Espressioni regolari(C++11)

Operazioni atomicche(C++11)

Multithreading(C++11)

 

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 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

 

Pseudo-casuale generazione

Motori e adattatori del motore 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)

Generatori 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)

Distribuzioni Original: Distributions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

Distribuzioni uniformi 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)

Bernoulli distribuzioni 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)

Poisson distribuzioni 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)

Distribuzioni normali 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)

Distribuzioni di campionamento 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)

Seed Sequenze 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)

Libreria 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::normal_distribution

Membri funzioni 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.

normal_distribution::normal_distribution

normal_distribution::reset

Generazione Original: Generation The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

normal_distribution::operator()

Caratteristiche Original: Characteristics The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

normal_distribution::mean

normal_distribution::stddev

normal_distribution::param

normal_distribution::min

normal_distribution::max

Non membri funzioni 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>>

 

Elemento definito nell'header <random>
template<class RealType =double> class normal_distribution;		(dal C++11)

Normale (o Guassian) la distribuzione di numeri casuali:

f(x; μ,σ) = None

1

σ√2π

exp⎛
⎜
⎝-

1

2

⎛
⎜
⎝

x-μ

σ

⎞
⎟
⎠2
⎞
⎟
⎠

Con la direμ e il deviazione standard (stddev') σ.

Original:

With the direμ and the deviazione standard (stddev) σ.

The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

Membri tipi

Membro tipo 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	il tipo di set di parametri, non specificato 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.

Membri funzioni

(costruttore)	costruisce nuova distribuzione 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. (metodo pubblico)
reset	ripristina lo stato interno della distribuzione 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. (metodo pubblico)
Generazione Original: Generation The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
operator()	genera il successivo numero casuale nella distribuzione 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. (metodo pubblico)
Caratteristiche Original: Characteristics The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
mean	restituisce l'(μ) parametro di distribuzione media Original: returns the mean (μ) distribution parameter The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (metodo pubblico)
stddev	restituisce la deviazione standard (σ) parametro di distribuzione Original: returns the standard deviation (σ) distribution parameter The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (metodo pubblico)
param	ottiene o imposta l'oggetto parametro di distribuzione 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. (metodo pubblico)
min	restituisce il valore minimo potenzialmente generato 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. (metodo pubblico)
max	restituisce il valore massimo potenzialmente generato 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. (metodo pubblico)

Non membri funzioni

operator== operator!=	confronta due oggetti di distribuzione 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. (funzione)
operator<< operator>>	esegue flusso di ingresso e di uscita sul pseudo-casuale distribuzione numerica 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. (funzione)

Esempio

#include <iostream>#include <iomanip>#include <string>#include <map>#include <random>#include <cmath>int main(){ std::random_device rd;std::mt19937 gen(rd());   // values near the mean are the most likely// standard deviation affects the dispersion of generated values from the mean std::normal_distribution<> d(5,2);   std::map<int, int> hist;for(int n=0; n<10000;++n){++hist[std::round(d(gen))];}for(auto p : hist){std::cout<<std::fixed<<std::setprecision(1)<<std::setw(2)<< p.first<<' '<<std::string(p.second/200, '*')<<'\n';}}

Output:

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

Collegamenti esterni

• Weisstein, Eric W. "Normal Distribution." Da MathWorld - Una risorsa Web Wolfram.

  Original:

  Weisstein, Eric W. "Normal 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.
• Distribuzione normale . Da Wikipedia.

  Original:

  Distribuzione normale . From Wikipedia.

  The text has been machine-translated via Google Translate.
  You can help to correct and verify the translation. Click here for instructions.