mad
===

mean absolute deviation



Calling Sequence
~~~~~~~~~~~~~~~~


::

    s2=mad(x)
    s2=mad(x,'r') or s2=mad(x,1)
    s2=mad(x,'c') or s2=mad(x,2)




Arguments
~~~~~~~~~

:x real or complex vector or matrix
:



Description
~~~~~~~~~~~

This function computes the mean absolute deviation of a real or
complex vector or matrix `x`.

For a vector or matrix `x`, `s2=mad(x)` returns in scalar `s2` the
mean absolute deviation of all the entries of `x`.

`s2=mad(x,'r')` (or, equivalently, `s2=mad(x,1)`) returns in each
entry of the column vector `s2` the mean absolute deviation of each
column of `x`.

`s2=mad(x,'c')` (or, equivalently, `s2=mad(x,2)`) returns in each
entry of the column vector `s2` the mean absolute deviation of each
row of `x`.



Bibliography
~~~~~~~~~~~~

Reference: Wonacott T.H.& Wonacott R.J. .- Introductory Statistics,
5th edition, John Wiley, 1990.