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sequential difference in a single column with field calculator

Question asked by parkygis on May 27, 2018
Latest reply on May 27, 2018 by parkygis

Hello,

I have a column for elevation for a point data set.  I would like to create a new column to show a difference between Row(n) and Row(n+1) values.  well, I assume that the easiest way is calculating in EXCEL (=abs(A1-A2)) then make a join at ArcGIS.  However, I would like to the process with "Field calculator"   Does anyone know how to do it? 

Thanks in advance

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