MEDIAN data elements, 
 [y]=median(x [,DIM])

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

 features:
 - can deal with NaN's (missing values)
 - accepts dimension argument like in Matlab in Octave, too. 
 - compatible to Matlab and Octave 

 see also: SUMSKIPNAN

Package: nan