an><span class="p">,</span><span class="w"> </span><span class="n">iupper</span><span class="w"> </span><span class="p">,</span><span class="w"> </span><span class="n">N</span>
<span class="c">!</span>
<span class="c">!     INPUT ARGUMENTS--X      = THE  VECTOR OF</span>
<span class="c">!                                (UNSORTED OR SORTED) OBSERVATIONS.</span>
<span class="c">!                     --N      = THE INTEGER NUMBER OF OBSERVATIONS</span>
<span class="c">!                                IN THE VE