I need to isolate a single point within each cluster of data points
distributed over several channels. There are multiple clusters of data
throughout the survey.

ie.    Channel_1        Channel_2        Channel_3       Channel_4
New_Channel
           *                *                *               *
*
           *                *                *               *
*
           *                *                *               *
*
           8.5            7.2              7.3             7.2
*
           9.5            7.3              6.3             7.1
*
          18.5           17.2             16.3            17.1
*
          28.5           37.2             26.3            15.1
37.2
           8.9            7.9              6.3             7.1
*
           *                *                *               *
*
           *                *                *               *
*
           *                *                *               *
*

Do you have an example of an expression that would achieve the result above?
In this case the
highest value has been picked and placed into "new_channel".

Michel Godbout
Condor Consulting Inc.
www.condorconsult.com
(303) 423-8475 (303) 423-9729 fax
mailto:[EMAIL PROTECTED]






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