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Top Forums Shell Programming and Scripting Match two files and divide fields Post 302483407 by clx on Monday 27th of December 2010 02:33:01 AM
Old 12-27-2010
something like..

Code:
#! /usr/local/bin/bash
exec 6<f2
while IFS=, read v1 v2 v3 v4 v5 v6
do
        IFS=, read n1 n2 n3 n4 n5 n6 <&6
        if [ "$v1" = "$n1" ]; then
                echo $v1,$(echo "scale=2;$v2/$n2" | bc),$(echo "scale=2;$v3/$n3" | bc),$(echo "scale=2;$v4/$n4" | bc),$(echo "scale=2;$v5/$n5" | bc),$(echo "scale=2;$v6/$n6" | bc)
        fi
done < f1
6<&-

O/P for the given sample:
Code:
12/16/2010,1.08,1.08,1.07,1.07,.12
12/17/2010,1.07,1.08,1.07,1.07,.12
12/20/2010,1.08,1.08,1.08,1.08,.11
12/21/2010,1.08,1.08,1.07,1.07,.10
12/22/2010,1.08,1.07,1.07,1.07,.09

Note: I have changed the date for the last row to test and its ignored.

May be awk solution would be simpler.
This User Gave Thanks to clx For This Post:
 

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shells(4)							   File Formats 							 shells(4)

NAME
shells - shell database SYNOPSIS
/etc/shells DESCRIPTION
The shells file contains a list of the shells on the system. Applications use this file to determine whether a shell is valid. See getuser- shell(3C). For each shell a single line should be present, consisting of the shell's path, relative to root. A hash mark (#) indicates the beginning of a comment; subsequent characters up to the end of the line are not interpreted by the routines which search the file. Blank lines are also ignored. The following default shells are used by utilities: /bin/bash, /bin/csh, /bin/jsh, /bin/ksh, /bin/ksh93, /bin/pfcsh, /bin/pfksh, /bin/pfsh, /bin/sh, /bin/tcsh, /bin/zsh, /sbin/jsh, /sbin/sh, /usr/bin/bash, /usr/bin/csh, /usr/bin/jsh, /usr/bin/ksh, /usr/bin/ksh93, /usr/bin/pfcsh, /usr/bin/pfksh, /usr/bin/pfsh, and /usr/bin/sh, /usr/bin/tcsh, /usr/bin/zsh, and /usr/sfw/bin/zsh. /etc/shells overrides the default list. Invalid shells in /etc/shells could cause unexpected behavior, such as being unable to log in by way of ftp(1). FILES
/etc/shells list of shells on system SEE ALSO
vipw(1B), ftpd(1M), sendmail(1M), getusershell(3C), aliases(4) SunOS 5.11 20 Nov 2007 shells(4)
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