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Full Discussion: Arithmetic operation between columns using loop variable
Top Forums Shell Programming and Scripting Arithmetic operation between columns using loop variable Post 302485346 by Surabhi_so_mh on Wednesday 5th of January 2011 01:55:40 AM
Old 01-05-2011
Arithmetic operation between columns using loop variable
Hi
I have a file with 3 columns. say,
infile:
Code:
1  50   68
34 3   23
23  4  56
-------
-------

I want to generate n files from this file using a loop so that 1st column in output file is (column1 of infile/(2*n+2.561))

I am doing like this:
Code:
for ((i=1; i<=3; i++))
do
  a=`echo "2*$i+2.561" | bc -l`   
  awk '{ printf"%.8f %.8f %.8f\n", ($1/a), $2, $3 }' infile >> out$i
done

but it seems variable a has to be defined within awk. how can I use i in it? Please help
Last edited by Franklin52; 01-05-2011 at 03:51 AM.. Reason: Please use code tags and indent your code, thanks
 

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