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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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Graphics::Primitive::Insets(3pm)			User Contributed Perl Documentation			  Graphics::Primitive::Insets(3pm)

NAME
Graphics::Primitive::Insets - Space between things DESCRIPTION
Graphics::Primitive::Insets represents the amount of space that surrounds something. This object can be used to represent either padding or margins (in the CSS sense, one being inside the bounding box, the other being outside) SYNOPSIS
use Graphics::Primitive::Insets; my $insets = Graphics::Primitive::Insets->new({ top => 5, bottom => 5, left => 5, right => 5 }); METHODS
Constructor new Creates a new Graphics::Primitive::Insets. Instance Methods as_array Return these insets as an array in the form of top, right, bottom and left. bottom Set/Get the inset from the bottom. equal_to Determine if these Insets are equal to another. left Set/Get the inset from the left. right Set/Get the inset from the right. top Set/Get the inset from the top. zero Sets all the insets (top, left, bottom, right) to 0. AUTHOR
Cory Watson, "<gphat@cpan.org>" SEE ALSO
perl(1) COPYRIGHT &; LICENSE Copyright 2008-2010 by Cory G Watson. This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself. perl v5.12.3 2010-08-21 Graphics::Primitive::Insets(3pm)
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