std::binomial_distribution<IntType>::param

 

C++

Compiler support

Freestanding and hosted

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Standard library headers

Named requirements

Feature test macros (C++20)

Language support library

Concepts library (C++20)

Diagnostics library

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Metaprogramming library (C++11)

General utilities library

Containers library

Iterators library

Ranges library (C++20)

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Technical specifications

Symbols index

External libraries

 

Numerics library

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gcd (C++17)	lcm (C++17)
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iota (C++11) ranges::iota (C++23) accumulate inner_product adjacent_difference    partial_sum	reduce (C++17) transform_reduce (C++17) inclusive_scan (C++17) exclusive_scan (C++17) transform_inclusive_scan (C++17) transform_exclusive_scan (C++17)
C-style checked integer arithmetic
ckd_add (C++26) ckd_sub (C++26)	ckd_mul (C++26)

 

Pseudo-random number generation

Uniform random bit generators   uniform_random_bit_generator (C++20) Random number engines linear_congruential_engine (C++11) mersenne_twister_engine (C++11) subtract_with_carry_engine (C++11) philox_engine (C++26) Random number engine adaptors discard_block_engine (C++11) independent_bits_engine (C++11) shuffle_order_engine (C++11) Predefined random number generators Non-deterministic random numbers random_device (C++11) Utilities generate_canonical (C++11) seed_seq (C++11) Random number algorithms ranges::generate_random (C++26) C random library rand    srand    RAND_MAX

Random number distributions Uniform distributions uniform_int_distribution (C++11) uniform_real_distribution (C++11) generate_canonical (C++11) Bernoulli distributions bernoulli_distribution (C++11) binomial_distribution (C++11) negative_binomial_distribution (C++11) geometric_distribution (C++11) Poisson distributions poisson_distribution (C++11) exponential_distribution (C++11) gamma_distribution (C++11) weibull_distribution (C++11) extreme_value_distribution (C++11) Normal distributions 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) Sampling distributions discrete_distribution (C++11) piecewise_constant_distribution (C++11) piecewise_linear_distribution (C++11)

 

std::binomial_distribution

Member functions

binomial_distribution::binomial_distribution

binomial_distribution::reset

Generation

binomial_distribution::operator()

Characteristics

binomial_distribution::pbinomial_distribution::t

binomial_distribution::param

binomial_distribution::min

binomial_distribution::max

Non-member functions

operator==operator!= (C++11)(C++11)(until C++20)

operator<<operator>> (C++11)(C++11)

 

param_type param() const;	(1)	(since C++11)
void param( const param_type& params );	(2)	(since C++11)

Manages the associated distribution parameter set.

1) Returns the associated parameter set.

2) Sets the associated parameter set to params.

Parameters

params

-

new contents of the associated parameter set

Return value

1) The associated parameter set.

2) (none)

Complexity

Constant.

Example

Run this code

#include <iostream>
#include <random>
 
int main()
{
    std::random_device rd;
    std::mt19937 gen(rd();
    using BinomialDist = std::binomial_distribution<>;
    BinomialDist bino_dis(1, 0.5);
 
    std::cout << "A sample of Binomial(  1, 0.5): " << bino_dis(gen) << '\n';
 
    / Use another parameter set
    bino_dis.param(BinomialDist::param_type(100,0.9);
    std::cout << "A sample of Binomial(100, 0.9): " << bino_dis(gen) << '\n';
}

Possible output:

A sample of Binomial(  1, 0.5): 0
A sample of Binomial(100, 0.9): 94

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