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Full Discussion: Analyzing last 2 fields of 1 row and 3rd field of next row
Top Forums Shell Programming and Scripting Analyzing last 2 fields of 1 row and 3rd field of next row Post 303034474 by RudiC on Friday 26th of April 2019 04:19:19 PM
Old 04-26-2019
For exactly your above laid out problem, try
Code:
awk 'NR > 1 {print LEADIN, (sum+$3)/3} {LEADIN = $1 OFS $2; sum = $13 + $14} ' file
01001 271895 59.5933
01001 271896 60.9133
01001 271897 62.4867

The output format can be modified by setting the OFMT variable.
For a two field summation, a for loop is not necessary, and you don't need a count if you're always adding three elements. If, on the other hand, you want a more generic approach, combine your attempt with this one.
These 2 Users Gave Thanks to RudiC For This Post:
ncwxpanther rbatte1
 

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LEARN ABOUT SUNOS

sum

sum(1B) 					     SunOS/BSD Compatibility Package Commands						   sum(1B)

NAME

       sum - calculate a checksum for a file

SYNOPSIS

       /usr/ucb/sum file...

DESCRIPTION

       sum  calculates	and  displays a 16-bit checksum for the named file and displays the size of the file in kilobytes. It is typically used to
       look for bad spots, or to validate a file communicated over some transmission line. The checksum is calculated by an  algorithm	which  may
       yield different results on machines with 16-bit ints and machines with 32-bit ints, so it cannot always be used to validate that a file has
       been transferred between machines with different-sized ints.

USAGE

       See largefile(5) for the description of the behavior of sum when encountering files greater than or equal to 2 Gbyte ( 2**31 bytes).

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWscpu			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       sum(1), wc(1), attributes(5), largefile(5)

DIAGNOSTICS

       Read error is indistinguishable from EOF on most devices; check the block count.

NOTES

       sum and /usr/bin/sum (see sum(1)) return different checksums.

       This utility is obsolete.

SunOS 5.10							    8 Nov 1995								   sum(1B)
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