betastat - Beta mean and variance
Syntax
[M,V] = betastat(A,B)
Description
[M,V] = betastat(A,B),
with A>0 and B>0, returns
the mean of and variance for the beta distribution with parameters
specified by A and B. A and B 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 A or B is expanded to
a constant array with the same dimensions as the other input.
The mean of the beta distribution with parameters a and b is
and
the variance is
Examples
If parameters a and b are
equal, the mean is 1/2.
a = 1:6;
[m,v] = betastat(a,a)
m =
0.5000 0.5000 0.5000 0.5000 0.5000 0.5000
v =
0.0833 0.0500 0.0357 0.0278 0.0227 0.0192
See Also
betacdf | betafit | betainv | betalike | betapdf | betarnd
How To
 | betarnd | | BIC property (gmdistribution) |  |
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