

   TTuukkeeyy FFiivvee--NNuummbbeerr SSuummmmaarriieess

        fivenum(x, na.rm = TRUE)

   AArrgguummeennttss::

          x: numeric, maybe including `NA''s and +/-`Inf's.

      na.rm: logical; if `TRUE', all `NA' and `NaN's are
             dropped, before the statistics are computed.

   VVaalluuee::

        A five number summary (minimum, lower-hinge, median,
        upper-hinge, maximum) for the (non `NA') numbers in
        `x'.

   SSeeee AAllssoo::

        `IQR', `boxplot.stats', `median', `quantile', `range'.

   EExxaammpplleess::

        fivenum(c(rnorm(100),-1:1/0))

