binostat
Binomial mean and variance
Syntax
[M,V] = binostat(N,P)
Description
[M,V] = binostat(N,P)
returns
the mean of and variance for the binomial distribution with parameters
specified by the number of trials, N
, and probability
of success for each trial, P
. N
and P
can
be vectors, matrices, or multidimensional arrays that have the same
size, which is also the size of M
and V
.
A scalar input for N
or P
is
expanded to a constant array with the same dimensions as the other
input.
The mean of the binomial distribution with parameters n and p is np. The variance is npq, where q = 1 – p.
Examples
n = logspace(1,5,5) n = 10 100 1000 10000 100000 [m,v] = binostat(n,1./n) m = 1 1 1 1 1 v = 0.9000 0.9900 0.9990 0.9999 1.0000 [m,v] = binostat(n,1/2) m = 5 50 500 5000 50000 v = 1.0e+04 * 0.0003 0.0025 0.0250 0.2500 2.5000
Extended Capabilities
Version History
Introduced before R2006a