

   MMeeddiiaann AAbbssoolluuttee DDeevviiaattiioonn

        mad(x, center, constant=1.4826, na.rm=FALSE)

   DDeessccrriippttiioonn::

        `mad' provides a scale estimate based on the median
        absolute deviation.  The actual value calculated is
        `constant * (median(abs(x - center)))' with the default
        value of `center' being `median(x)'.

        If `na.rm' is `TRUE' then `NA' values are stripped from
        `x' before computation takes place.  If this is not
        done then an `NA' value in `x' will cause `mad' to
        return `NA'.

   SSeeee AAllssoo::

        `median', `var'.

