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Top Forums Shell Programming and Scripting Comparing Columns of two FIles Post 302107409 by ggopal on Friday 16th of February 2007 01:03:22 PM
Old 02-16-2007
Comparing Columns of two FIles

Dear all,

I have two files in UNIX File1 and File2 as below:

File1:
1,1234,.,67.897,,0
1,4134,.,87.97,,4
0,1564,.,97.8,,1

File2:
2,8798,.,67.897,,0
2,8879,.,77.97,,4
0,1564,.,97.8,,1

I want to do the following:
(1) Make sure that both the files have equal number of columns and if not error out
(2) If there are equal number of columns then compare each corresponding field from both the files line by line and if there is any difference then print the two different values with line number and column number.

I know that 'diff -w' is useful here because it compares ignoring leading, trailing or in-between spaces which is useful because all my columns are numeric.

Can I use say 'awk' and its NF and NR variables along with diff? Or is there any other way? Please advise. I thank you for your help.

GG
 

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KDIFF3(1)						      General Commands Manual							 KDIFF3(1)

NAME
KDiff3 -- compares two or three input files or directories SYNOPSIS
KDiff3 [QT options] [KDE options] [KDiff3 options] [File1/base] [File2] [File3] DESCRIPTION
This manual page documents briefly the KDiff3 tool. This manual page was written for the Debian distribution because the original program does not have a manual page. For comprehensive help, please see khelpcenter help:/kdiff3. KDiff3 is a program that o compares or merges two or three text input files or directories o shows the differences line by line and character by character o provides an automatic merge-facility and o an integrated editor for comfortable solving of merge-conflicts o supports Unicode, UTF-8 and other codecs o supports KIO on KDE (allows accessing ftp, sftp, fish, smb etc.) o Printing of differences o Manual alignment of lines o Automatic merging of version control history ($Log$) OPTIONS
This program follows the usual GNU command line syntax, with long options starting with two dashes (`-'). A summary of options is included below. For a full summary of options, run KDiff3 --help. -m, --merge Merge the input. -b, --base file Explicit base file. For compatibility with certain tools. -o, --output file Output file. Implies -m. E.g.: -o newfile.txt --out file Output file, again. (For compatibility with certain tools.) --auto No GUI if all conflicts are auto-solvable. (Needs -o file) --qall Don't solve conflicts automatically. (For compatibility...) -L1 alias Visible name replacement for first file/base file. -L2 alias Visible name replacement for second file. -L3 alias Visible name replacement for third file. -L, --fname alias Visible name replacement. May by supplied for each input. --cs string Change a setting, e. g. --cs "AutoAdvance=1". --confighelp Show a list of all settings and their values. --config file Use a different settings file. --author Show author of program. -v, --version Show version of program. --license Show license of program. AUTHOR
This manual page was written by Eike Sauer <eike@debian.org> for the Debian system (but may be used by others). Permission is granted to copy, distribute and/or modify this document under the terms of the GNU General Public License, Version 2 (or, at your option, any later version published by the Free Software Foundation). On Debian systems, the complete text of the GNU General Public License can be found in /usr/share/common-licenses/GPL. KDIFF3(1)
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