random_uniform_discrete
Generates pseudorandom numbers from a discrete uniform distribution.
Synopsis
#include <imsls.h>
int *imsls_f_random_uniform_discrete(int n_random, int k, …, 0)
The type double function is imsls_d_random_uniform_discrete.
Required Arguments
int n_random (Input)
Number of random numbers to generate.
int k (Input)
Parameter of the discrete uniform distribution. The integers 1, 2, ..., k occur with equal probability. Parameter k must be positive.
Return Value
An integer array of length n_random containing the random discrete uniform deviates.
Synopsis with Optional Arguments
#include <imsls.h>
int *imsls_f_random_uniform_discrete (int n_random, int k,
IMSLS_RETURN_USER, int ir[],
0)
Optional Arguments
IMSLS_RETURN_USER, int ir[] (Output)
User-supplied integer array of length n_random containing the random discrete uniform deviates.
Description
Function imsls_f_random_uniform_discrete generates pseudorandom numbers from a uniform discrete distribution over the integers 1, 2, ...k. A random integer is generated by multiplying k by a uniform (0, 1) random number, adding 1.0, and truncating the result to an integer. This, of course, is equivalent to sampling with replacement from a finite population of size k.
Example
In this example, imsls_f_random_uniform_discrete generates five pseudorandom discrete uniform deviates from a discrete uniform distribution over the integers 1 to 6.
#include <imsls.h>
int main()
{
int n_random = 5;
int k = 6;
int *ir;
imsls_random_seed_set(123457);
ir = imsls_f_random_uniform_discrete(n_random, k,
0);
imsls_i_write_matrix("Discrete uniform (1, 6) random deviates:" , 1,
n_random, ir,
IMSLS_NO_COL_LABELS,
0);
}
Output
Discrete uniform (1, 6) random deviates:
6 2 5 4 6