STATISTIC estimates various statistics at once.
 
 R = STATISTIC(x,DIM)
   calculates all statistic (see list of fun) in dimension DIM
   R is a struct with all statistics 

 y = STATISTIC(x,fun)
   estimate of fun on dimension DIM
   y gives the statistic of fun	

 DIM	dimension
	1: STATS of columns
	2: STATS of rows
 	N: STATS of  N-th dimension 
	default or []: first DIMENSION, with more than 1 element

 fun	'mean'	mean
	'std'	standard deviation
	'var'	variance
	'sem'	standard error of the mean
	'rms'	root mean square
	'meansq' mean of squares
	'sum'	sum
	'sumsq'	sum of squares
	'CM#'	central moment of order #
	'skewness' skewness 
	'kurtosis' excess coefficient (Fisher kurtosis)
	'mad'	mean absolute deviation

 features:
 - can deal with NaN's (missing values)
 - dimension argument 
 - compatible to Matlab and Octave

 see also: SUMSKIPNAN

 REFERENCE(S):
 [1] http://www.itl.nist.gov/
 [2] http://mathworld.wolfram.com/

Package: nan