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Top Forums Shell Programming and Scripting Sum of three columns - in 4N columns file Post 302384824 by ahmad.diab on Wednesday 6th of January 2010 11:07:39 AM
Old 01-06-2010
Try this and let me know it is what you want.use nawk or gawk
or /usr/xpg4/bin/awk

from your description above 4*N=number of columns (NF always even number) so N=NF/4


Code:
nawk '{ for (i=1;i<=NF;i++) { $i=$((NF/4)+i) + $(2*(NF/4)+i) + $(3*(NF/4)+i)printf "%.4E\t",$i}
print "" }'  infile.txt

SmilieSmilieSmilie

Last edited by ahmad.diab; 01-06-2010 at 12:28 PM..
 

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COLUMN(1)						    BSD General Commands Manual 						 COLUMN(1)

NAME
column -- columnate lists SYNOPSIS
column [-tx] [-c columns] [-s sep] [file ...] DESCRIPTION
The column utility formats its input into multiple columns. Rows are filled before columns. Input is taken from file operands, or, by default, from the standard input. Empty lines are ignored. The options are as follows: -c Output is formatted for a display columns wide. -s Specify a set of characters to be used to delimit columns for the -t option. -t Determine the number of columns the input contains and create a table. Columns are delimited with whitespace, by default, or with the characters supplied using the -s option. Useful for pretty-printing displays. -x Fill columns before filling rows. column exits 0 on success, >0 if an error occurred. ENVIRONMENT
COLUMNS The environment variable COLUMNS is used to determine the size of the screen if no other information is available. EXAMPLES
(echo "PERM LINKS OWNER GROUP SIZE MONTH DAY HH:MM/YEAR NAME"; ls -l | sed 1d) | column -t SEE ALSO
colrm(1), ls(1), paste(1), sort(1) HISTORY
The column command appeared in 4.3BSD-Reno. BSD
March 9, 2008 BSD
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