Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: awk for comparing two files
Top Forums Shell Programming and Scripting awk for comparing two files Post 302565342 by Jaymz on Monday 17th of October 2011 03:25:38 PM
Old 10-17-2011
awk for comparing two files
so have file1 like this:

Code:
joe 123
jane 456

and then file2 like this:

Code:
123 left right
456 up down
joe ding dong
jane flip flop

what I need to do is compare col1 and col2 in file1 with col1 in file2 and generate a new file that has lines like this:

Code:
joe 123 ding dong left right
jane 456 flip flop up down

what I did so far is this:

Code:
# this grabs the 'left' value
awk 'NR==FNR{a[$1]=$2;next} {print $1,$2,a[$2]}' file2 file1 >> file3
# this grabs the 'right' value
awk 'NR==FNR{a[$1]=$3;next} {print $1,$2,$3,a[$2]}' file2 file3 >> file4

which generates this line:

joe 123 left right

but I am stuck on grabbing joe's 'ding dong' and also, am I doing this right with multiple awk lines, or can it be made more compact ?
Last edited by radoulov; 10-17-2011 at 04:50 PM.. Reason: Additional code tags!
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

comparing two files using awk.

Hi All, a new bie to awk, How to compare substring of col1,file 1 with col2file2 and get file1contents+col3file2 as output. file1 ----- kumarfghh,23,12000,5000 rajakumar,24,14000,2500 rajeshchauhan,25,16000,2600 manoj,26,17000,2300 file 2 -------- 123,kumar,US, 123,sukumar,UK... (4 Replies)
Discussion started by: jerome Sukumar
4 Replies

2. Shell Programming and Scripting

Comparing two files using awk

Hi, I have 2 text files n1 and n2. cat n1 : -------- 1234567890 4444444444 cat n2 : --------- 1234567890 4444444444 7777777777 8888888888 they are some sample records. File n1 contains some lookup records, whereas file n2 contains some transaction records. I need to get the... (2 Replies)
Discussion started by: kanu_kanu
2 Replies

3. Shell Programming and Scripting

awk - comparing files

I've been trying to use awk to compare two files that have pretty much the same data in apart from certain lines where in one file a fields value has changed. I want to print the line from the first file and the changed line from the second file. At the moment, all I can get it to do is print the... (6 Replies)
Discussion started by: dbrundrett
6 Replies

4. Shell Programming and Scripting

comparing files with field using awk

hi, i have 1 files a.csv temp.out a.cvs looks like add,16390,180,674X,HALIFAX_COMMONS_X,902,497,902-209 add,16390,180,674X,HALIFAX_COMMONS_X,902,497,902-219 add,16390,180,674X,HALIFAX_COMMONS_X,902,497,902-220 add,16390,180,674X,HALIFAX_COMMONS_X,902,497,902-221 and temp.out looks... (1 Reply)
Discussion started by: raghavendra.cse
1 Replies

5. Shell Programming and Scripting

Comparing 2 input files -Awk

Compare 2 files and print the values input1 (c1 20 100 X_y10) along with one closest highest (c1 100 200 X_y10) and one lowest values (c1 10 15 X_y10) from input2 input1 c1 20 100 X_y10 input2 c1 5 10 X_y10 c1 10 15 X_y10 c1 100 200 X_y10 c1 200 300 X_y10 output ... (8 Replies)
Discussion started by: bumblebee_2010
8 Replies

6. Shell Programming and Scripting

comparing two files using awk

hit brick wall while trying to knock up a script that will take values from the "lookup" file and look it up in the "target" file and return values that dont appear in "target" but do in "lookup". just knocked up something using bits from previous threads but theres gotta be something wrong... (13 Replies)
Discussion started by: jack.bauer
13 Replies

7. UNIX for Advanced & Expert Users

Comparing two files using awk

i have one file say file1 having many records.Each record contains 2000 characters.i have to compare 192-200 (stored as name)characters in this file from other file say file2 having name stored in 1-9 characters. after comparing i have to print the record from file1 in another file say file3 ... (3 Replies)
Discussion started by: sonam273
3 Replies

8. Shell Programming and Scripting

comparing 2 files with awk

Hi, I'm a new user in awk and i'm trying to compare two files to create a third one if some values match in both files. The first file has this content: s 45.960746365 _21_ AGT 2490 [21:0 22:0 s 45.980418496 _21_ AGT 2491 [21:0 22:0 s 46.000090627 _21_ AGT 2492 [21:0 22:0 s 47.906552206... (2 Replies)
Discussion started by: carlosoria
2 Replies

9. Shell Programming and Scripting

Comparing the matches in two files using awk when both files have their own field separators

I've two files with data like below: file1.txt: AAA,Apples,123 BBB,Bananas,124 CCC,Carrot,125 file2.txt: Store1|AAA|123|11 Store2|BBB|124|23 Store3|CCC|125|57 Store4|DDD|126|38 So,the field separator in file1.txt is a comma and in file2.txt,it is | Now,the output should be... (2 Replies)
Discussion started by: asyed
2 Replies

10. UNIX for Dummies Questions & Answers

Comparing two txt files with AWK

Hi, I need to compare two text files with awk. File1: ------- chr1 43815007 43815009 COSM19193 REF=TG;OBS=AA;ANCHOR=G AMPL495041 chr1 43815008 43815009 COSM18918 REF=G;OBS=T;ANCHOR=T AMPL495041 chr1 115256527 115256528 ... (6 Replies)
Discussion started by: RushiK
6 Replies

LEARN ABOUT NETBSD

merge

MERGE(1)						      General Commands Manual							  MERGE(1)

NAME

       merge - three-way file merge

SYNOPSIS

       merge [ options ] file1 file2 file3

DESCRIPTION

       merge  incorporates all changes that lead from file2 to file3 into file1.  The result ordinarily goes into file1.  merge is useful for com-
       bining separate changes to an original.	Suppose file2 is the original, and both file1 and file3 are modifications of  file2.   Then  merge
       combines both changes.

       A  conflict  occurs  if	both  file1 and file3 have changes in a common segment of lines.  If a conflict is found, merge normally outputs a
       warning and brackets the conflict with and lines.  A typical conflict will look like this:

	       file A
	      lines in file A
	      =======
	      lines in file B
	       file B

       If there are conflicts, the user should edit the result and delete one of the alternatives.

OPTIONS

       -A     Output conflicts using the -A style of diff3(1), if supported by diff3.  This merges all changes leading from file2  to  file3  into
	      file1, and generates the most verbose output.

       -E, -e These  options  specify conflict styles that generate less information than -A.  See diff3(1) for details.  The default is -E.  With
	      -e, merge does not warn about conflicts.

       -L label
	      This option may be given up to three times, and specifies labels to be used in place of the corresponding  file  names  in  conflict
	      reports.	 That  is, merge -L x -L y -L z a b c generates output that looks like it came from files x, y and z instead of from files
	      a, b and c.

       -p     Send results to standard output instead of overwriting file1.

       -q     Quiet; do not warn about conflicts.

       -V     Print version number.

DIAGNOSTICS

       Exit status is 0 for no conflicts, 1 for some conflicts, 2 for trouble.

IDENTIFICATION

       Author: Walter F. Tichy.
       Manual Page Revision: ; Release Date: .
       Copyright (C) 1982, 1988, 1989 Walter F. Tichy.
       Copyright (C) 1990, 1991, 1992, 1993, 1994, 1995 Paul Eggert.

SEE ALSO

       diff3(1), diff(1), rcsmerge(1), co(1).

BUGS

       It normally does not make sense to merge binary files as if they were text, but merge tries to do it anyway.

									GNU								  MERGE(1)
All times are GMT -4. The time now is 06:40 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy