BBS: Inland Empire Archive
Date: 08-13-92 (14:35)             Number: 165
From: RICK PEDLEY                  Refer#: NONE
  To: STEVE CRAVER                  Recvd: NO  
Subj: Fomula                         Conf: (2) Quik_Bas
 On 08-13-92 Steve Craver wrote to All...

 SC> Does anyone know the correct formula for finding the MEDIAN
 SC> of an array of numbers? Not the average, just the median.

Assuming the numbers are in an array, first sort the numbers by
whatever method you wish.  Then divide the number of elements
by 2 and round up; that element lies in the middle.  For example,
if the number of elements is 13, then

Els = 13
IF Els AND 1 THEN            'Tests to see if Els is odd
   Median! = N(Els\2 + 1)    'The value right in the middle
   Median! = (N(Els\2) + N(Els\2 + 1))/2

The middle value in the sorted list is the median.  If Els is
even, there is no middle value, so the two values on either
side of the halfway point are averaged.\

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