binornd (Statistics Toolbox)

Random numbers from the binomial distribution

Syntax

R = binornd(N,P)
R = binornd(N,P,mm)
R = binornd(N,P,mm,nn)

Description

R = binornd(N,P) generates random numbers from the binomial distribution with parameters specified by N and P. Vector or matrix inputs for N and P must have the same size, which is also the size of R. A scalar input for N or P is expanded to a constant matrix with the same dimensions as the other input.

R = binornd(N,P,mm) generates a matrix of size mm containing random numbers from the binomial distribution with parameters N and P, where mm is a 1-by-2 vector containing the row and column dimensions of R.

R = binornd(N,p,mm,nn) generates an mm-by-nn matrix containing random numbers from the binomial distribution with parameters N and P.

Algorithm

The binornd function uses the direct method using the definition of the binomial distribution as a sum of Bernoulli random variables.

Examples

n = 10:10:60;
r1 = binornd(n,1./n)
r1 =
     2     1     0     1     1     2
r2 = binornd(n,1./n,[1 6])
r2 =
     0     1     2     1     3     1
r3 = binornd(n,1./n,1,6)
r3 =
     0     1     1     1     0     3

binopdf binostat