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how to sum values from 2 different files?

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Top Forums Shell Programming and Scripting how to sum values from 2 different files?
# 8  
Old 01-01-2009
Quote:
Originally Posted by npk2210
Hi Johnson,

Your code is working. Can you please suggest me how to change the existing script to dynamic script with parameters, such that it take three file names as 3 parameters and add the content of first two files and insert the sum value into third file? Your help will be appreciated.

script(file1name, file2name, file3name)

{

body of script

file 3 should contain sum of file1 content and file2.

}
Code:
## NAME: fsub - subtract numbers in FILE1 from FILE2
## USAGE: fsub FILE1 FILE2 DESTFILE
paste "$1" "$2" | awk '{ print $2 - $1 }' > "$3"

# 9  
Old 01-02-2009
Code:
nawk '{
if(NR==FNR)
	_[NR]=$0
else
	print $0+_[FNR]
}' a.txt b.txt
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