iqr
===

interquartile range



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


::

    q=iqr(x)
    q=iqr(x,'r') (or, equivalently, q=iqr(x,1))
    q=iqr(x,'c') (or, equivalently, q=iqr(x,2))




Arguments
~~~~~~~~~

:x real or complex vector or matrix
:



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

This function computes the interquartile range IQR= upper quartile -
lower quartile of a vector or a matrix `x`.

For a vector or a matrix `x` , `q=iqr(x)` returns in the scalar `q`
the interquartile range of all the entries of `x`.

`q=iqr(x,'r')` (or, equivalently, `q=iqr(x,1)`) is the rowwise
interquartile range. It returns in each entry of the row vector `q`
the interquartile range of each column of `x`.

`q=iqr(x,'c')` (or, equivalently, `q=iqr(x,2)`) is the columnwise
interquartile range. It returns in each entry of the column vector `q`
the interquartile range of each row of `x`.



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

Wonacott, T.H.Wonacott, R.J.; Introductory Statistics, J.Wiley-Sons,
1990.