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Top Forums Shell Programming and Scripting Add fields in different files only if some fields between them match Post 302527847 by murpholinox on Sunday 5th of June 2011 10:44:52 PM
Old 06-05-2011
ok I have something like this..
the problem is that I do not know how to tell if field one AND field two match $line...

Code:
awk -F "," '{print $1, $2}' file1 >a
awk -F "," '{print $1, $2}' file2 >b
cat a b > c
sort -u c > d
cat d | while read line
do
   awk '{if ($1, $2 == '$line') print $0 }' file1 > e 
   awk '{if ($1, $2 == '$line') print $0}' file2  > f

done

paste e f > g
awk '{$4 + $8}' g > h

---------- Post updated at 09:36 PM ---------- Previous update was at 09:34 PM ----------

not to replace...but sum > field3file1+field3file2

---------- Post updated at 09:44 PM ---------- Previous update was at 09:36 PM ----------

Quote:
Originally Posted by rdcwayx
So you'd like to replace col 3 & 4 in file2, if there is match in file1 with col 1&2?
not to replace, but to sum .. x+y

pardon me, not quite good English.
 

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COMBINE(1)																COMBINE(1)

NAME
combine - combine sets of lines from two files using boolean operations SYNOPSIS
combine file1 and file2 combine file1 not file2 combine file1 or file2 combine file1 xor file2 _ file1 and file2 _ _ file1 not file2 _ _ file1 or file2 _ _ file1 xor file2 _ DESCRIPTION
combine combines the lines in two files. Depending on the boolean operation specified, the contents will be combined in different ways: and Outputs lines that are in file1 if they are also present in file2. not Outputs lines that are in file1 but not in file2. or Outputs lines that are in file1 or file2. xor Outputs lines that are in either file1 or file2, but not in both files. "-" can be specified for either file to read stdin for that file. The input files need not be sorted, and the lines are output in the order they occur in file1 (followed by the order they occur in file2 for the two "or" operations). Bear in mind that this means that the operations are not commutative; "a and b" will not necessarily be the same as "b and a". To obtain commutative behavior sort and uniq the result. Note that this program can be installed as "_" to allow for the syntactic sugar shown in the latter half of the synopsis (similar to the test/[ command). It is not currently installed as "_" by default, but you can alias it to that if you like. SEE ALSO
join(1) AUTHOR
Copyright 2006 by Joey Hess <joey@kitenet.net> Licensed under the GNU GPL. moreutils 2012-04-09 COMBINE(1)
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