Espacios de nombres
Variantes
    Acciones
       
      C++
      Apoyo de compiladores
      Implementaciones independientes y albergadas
      Lenguaje
      Biblioteca estándar
      Encabezados de la biblioteca estándar
      Requisitos denominados
      Macros de prueba de característica (C++20)
      Biblioteca de apoyo del lenguaje
      Biblioteca de conceptos (C++20)
      Biblioteca de diagnósticos
      Biblioteca de gestión de memoria
      Biblioteca de metaprogramación (C++11)
      Biblioteca de servicios generales
      Biblioteca de contenedores
      Biblioteca de iteradores
      Biblioteca de rangos (C++20)
      Biblioteca de algoritmos
      Biblioteca de cadenas
      Biblioteca de procesamiento de texto
      Biblioteca numérica
      Biblioteca de fecha y hora
      Biblioteca de entrada/salida
      Biblioteca del sistema de archivos (C++17)
      Biblioteca de apoyo de concurrencia (C++11)
      Biblioteca de apoyo de ejecución (C++26)
      Especificaciones técnicas
      Índice de símbolos
      Bibliotecas externas
       
      Biblioteca numérica
      Funciones matemáticas comunes
      Funciones matemáticas especiales (C++17)
      Constantes matemáticas (C++20)
      Algoritmos básicos de álgebra lineal (C++26)
      Entorno de punto flotante (C++11)
      Números complejos
      Arrays numéricos
      Generación de números pseudoaleatorios
      Operaciones de factores
      (C++17)
      (C++17)
      Interpolaciones
      (C++20)
      (C++20)
      Saturación aritmética
      (C++26)
      (C++26)
      (C++26)
      (C++26)
      (C++26)

      Operaciones numéricas genéricas
      (C++11)
      (C++23)
      (C++17)
      (C++17)
      (C++17)
      (C++17)
      (C++17)
      (C++17)
      Operaciones de bits
      (C++20)
      (C++23)
      (C++20)
      (C++20)
      (C++20)
      (C++20)
      (C++20)
      (C++20)
      (C++20)
      (C++20)
      (C++20)
      (C++20)
      (C++20)
      (C++20)
       
      Generación de números pseudoaleatorios
      Motores y adaptadores de motor
      Original:
      Engines and engine adaptors
      The text has been machine-translated via Google Translate.
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      (C++11)
      (C++11)
      (C++11)
      (C++11)
      (C++11)
      (C++11)
      Generadores
      Original:
      Generators
      The text has been machine-translated via Google Translate.
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      (C++11)
      Distribuciones
      Original:
      Distributions
      The text has been machine-translated via Google Translate.
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      Distribuciones uniformes
      Original:
      Uniform distributions
      The text has been machine-translated via Google Translate.
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      (C++11)
      (C++11)
      (C++11)
      Bernoulli distribuciones
      Original:
      Bernoulli distributions
      The text has been machine-translated via Google Translate.
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      (C++11)
      (C++11)
      (C++11)
      (C++11)
      Poisson distribuciones
      Original:
      Poisson distributions
      The text has been machine-translated via Google Translate.
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      (C++11)
      (C++11)
      (C++11)
      (C++11)
      (C++11)
      Distribuciones normales
      Original:
      Normal distributions
      The text has been machine-translated via Google Translate.
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      (C++11)
      (C++11)
      (C++11)
      (C++11)
      (C++11)
      (C++11)
      Distribuciones de muestreo
      Original:
      Sampling distributions
      The text has been machine-translated via Google Translate.
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      (C++11)
      (C++11)
      (C++11)
      Secuencias de semillas
      Original:
      Seed Sequences
      The text has been machine-translated via Google Translate.
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      (C++11)
      C biblioteca
      Original:
      C library
      The text has been machine-translated via Google Translate.
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      std::lognormal_distribution
      Las funciones miembro
      Original:
      Member functions
      The text has been machine-translated via Google Translate.
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      Generación
      Original:
      Generation
      The text has been machine-translated via Google Translate.
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      Características
      Original:
      Characteristics
      The text has been machine-translated via Google Translate.
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      Terceros funciones
      Original:
      Non-member functions
      The text has been machine-translated via Google Translate.
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      Definido en el archivo de encabezado <random>
      template< class RealType = double > class lognormal_distribution;
      		 (desde C++11)
      La distribución lognormal_distribution de números aleatorios genera números aleatorios x > 0 según una distribución log-normal:
      Original:
      The lognormal_distribution random number distribution produces random numbers x > 0 according to a log-normal distribution:
      The text has been machine-translated via Google Translate.
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      f(x; m,s) = None
      1
      sx√2 π
      exp⎛
      ⎜
      ⎝      - None
      (ln x - m)2
      2s2
      ⎞
      ⎟
      ⎠
      El m parámetro es la media y el parámetro s la desviación estándar .
      Original:
      The parameter m is the mean and the parameter s the standard deviation.
      The text has been machine-translated via Google Translate.
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      Tipos de miembros

      Miembro de tipo
      Original:
      Member type
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      		 Definition
      result_type RealType
      param_type
      el tipo del conjunto de parámetros, sin especificar
      Original:
      the type of the parameter set, unspecified
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      Las funciones miembro
      construye nueva distribución
      Original:
      constructs new distribution
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      (función miembro pública)
      restablece el estado interno de la distribución
      Original:
      resets the internal state of the distribution
      The text has been machine-translated via Google Translate.
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      (función miembro pública)
      Generación
      Original:
      Generation
      The text has been machine-translated via Google Translate.
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      		 genera el siguiente número aleatorio en la distribución
      (función miembro pública)
      Características
      Original:
      Characteristics
      The text has been machine-translated via Google Translate.
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      devuelve la media (m) parámetro de distribución
      Original:
      returns the mean (m) distribution parameter
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      (función miembro pública)
      devuelve la desviación estándar (s) parámetro de distribución
      Original:
      returns the standard deviation (s) distribution parameter
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      (función miembro pública)
      obtiene o establece el objeto de parámetro de distribución
      Original:
      gets or sets the distribution parameter object
      The text has been machine-translated via Google Translate.
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      (función miembro pública)
      devuelve el valor mínimo potencialmente generado
      Original:
      returns the minimum potentially generated value
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      (función miembro pública)
      devuelve el valor máximo potencialmente generado
      Original:
      returns the maximum potentially generated value
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      (función miembro pública)

      Terceros funciones

      		 compara dos objetos de distribución
      (función)
      		realiza flujo de entrada y salida en la distribución de números pseudo-aleatorios
      (función)

      Ejemplo

      Ejecuta este código
      #include <iostream>
#include <iomanip>
#include <string>
#include <map>
#include <random>
#include <cmath>
int main()
{
    std::random_device rd;
    std::mt19937 gen(rd());

    std::lognormal_distribution<> d(1.6, 0.25);
 
    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';
    }
}

      Salida: 

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

      Enlaces externos