VAR  VAR Variance Function


Usage
 
 Computes the variance of an array along a given dimension.  The general
 syntax for its use is
 
   y = var(x,d)
 
 where x is an n-dimensions array of numerical type.
 The output is of the same numerical type as the input.  The argument
 d is optional, and denotes the dimension along which to take
 the variance.  The output y is the same size as x, except
 that it is singular along the mean direction.  So, for example,
 if x is a 3 x 3 x 4 array, and we compute the mean along
 dimension d=2, then the output is of size 3 x 1 x 4.
 