Sponsored Content
Top Forums UNIX for Dummies Questions & Answers Merge two files with two columns being similar Post 302491297 by citaylor on Thursday 27th of January 2011 05:58:29 AM
Old 01-27-2011
Quote:
Originally Posted by Franklin52
Code:
awk 'NR==FNR{a[$1]=$2; next}a[$1]{print $1, a[$1], $0}' file1 file2

Hiya, could you tell me what the "}a[$1]{" does in the middle ?

Thanks a lot...
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Comparing similar columns in two different files

Hi, I have two text files.The first and the 2nd file have data in the same format For e.g. The first file has table_name1 column1 sum(column1) max(column1) min(column1) table_name1 column2 sum(column2) max(column2) min(column2) table_name1 coulmn3 sum(column3) max(column3) min(column3) ... (13 Replies)
Discussion started by: ragavhere
13 Replies

2. Shell Programming and Scripting

merge the two files which has contain columns

Hi may i ask how to accomplish this task: I have 2 files which has multiple columns first file 1 a 2 b 3 c 4 d second file 14 a 9 .... 13 b 10.... 12 c 11... 11 d 12... I want to merge the second file to first file that will looks like this ... (2 Replies)
Discussion started by: jao_madn
2 Replies

3. Shell Programming and Scripting

Merge columns of different files

Hi, I have tab limited file 1 and tab limited file 2 The output should contain common first column vales and corresponding 2nd column values; AND also unique first column value with corresponding 2nd column value of the file that contains it and 0 for the second file. the output should... (10 Replies)
Discussion started by: polsum
10 Replies

4. Shell Programming and Scripting

Computing the ratio of similar columns in the two files using awk script

Thanks Bartus11 for your help in the following code to compare the two files "t1" and "t2". awk 'NR==FNR{a=1;next}$2 in a{print $2}' t1 t2 First can anyone explain that what is the purpose of assigning a =1? Second, the current script is printing out the matched columns between the... (4 Replies)
Discussion started by: coder83
4 Replies

5. Shell Programming and Scripting

Merge two files with similar column entries

Hi , I have few files which contains user name and data transfer rate in MBs and this data is collected for year and for each month report is saved in 12 different files I have to merge all the files to prepare the final report Files are as below Similarly I have 10 more files ... (5 Replies)
Discussion started by: pratapsingh
5 Replies

6. Shell Programming and Scripting

Merging two columns from two files with similar names into a loop

I have two files like this: fileA.net A B C fileA.dat 1 2 3 and I want the output output_expected A 1 B 2 C 3 I know that the easier way is to do a paste fileA.net fileA.dat, but the problem is that I have 10,000 couple of files (fileB.net with fileB.dat; fileC.net with... (3 Replies)
Discussion started by: valente
3 Replies

7. Shell Programming and Scripting

Merge columns on different files

Hello, I have two files that have this format: file 1 86.82 0.00 86.82 43.61 86.84 0.00 86.84 43.61 86.86 0.00 86.86 43.61 86.88 0.00 86.88 43.61 file 2 86.82 0.22 86.84 0.22 86.86 0.22 86.88 0.22 I would like to merge these two files such that the final file looks like... (5 Replies)
Discussion started by: kayak
5 Replies

8. Shell Programming and Scripting

Merge 2 files with one reference columns

Hi All Source1 servername1,patchid1 servername1,patchid2 servername1,patchid3 servername2,patchid1 servername2,patchid2 servername3,patchid4 servername3,patchid5 Source2 servername1,appname1 servername1,appname2 servername1,appname3 servername2,appname1 servername2,appname2... (13 Replies)
Discussion started by: mv_mv
13 Replies

9. Shell Programming and Scripting

Merge specific columns of two files

Hello, I have two tab delimited text files. Both files have the same number of rows but not necessarily the same number of columns. The column headers look like, File 1: f0order CVorder Name f0 RI_9 E99 E199 E299 E399 E499 E599 E699 E799 E899 E999 File 2:... (9 Replies)
Discussion started by: LMHmedchem
9 Replies

10. Shell Programming and Scripting

Merge columns from two files using awk

I have two csv files : say a.csv, b.csv a.csv looks like this : property1,property2,100 property3,property4,200 In a.csv, the combination of column1 and column2 will be unique b.csv looks like this property1,property2, 300, t1 property1,property2, 400,t2 property3, property4,800,t1... (2 Replies)
Discussion started by: Lakshmikumari
2 Replies
COLUMN(1)						    BSD General Commands Manual 						 COLUMN(1)

NAME
column -- columnate lists SYNOPSIS
column [-entx] [-c columns] [-s sep] [file ...] DESCRIPTION
The column utility formats its input into multiple columns. Rows are filled before columns. Input is taken from file operands, or, by default, from the standard input. Empty lines are ignored unless the -e option is used. The options are as follows: -c Output is formatted for a display columns wide. -s Specify a set of characters to be used to delimit columns for the -t option. -t Determine the number of columns the input contains and create a table. Columns are delimited with whitespace, by default, or with the characters supplied using the -s option. Useful for pretty-printing displays. -x Fill columns before filling rows. -n By default, the column command will merge multiple adjacent delimiters into a single delimiter when using the -t option; this option disables that behavior. This option is a Debian GNU/Linux extension. -e Do not ignore empty lines. ENVIRONMENT
The COLUMNS, LANG, LC_ALL and LC_CTYPE environment variables affect the execution of column as described in environ(7). EXIT STATUS
The column utility exits 0 on success, and >0 if an error occurs. EXAMPLES
(printf "PERM LINKS OWNER GROUP SIZE MONTH DAY " ; printf "HH:MM/YEAR NAME " ; ls -l | sed 1d) | column -t SEE ALSO
colrm(1), ls(1), paste(1), sort(1) HISTORY
The column command appeared in 4.3BSD-Reno. BUGS
Input lines are limited to LINE_MAX (2048) bytes in length. BSD
July 29, 2004 BSD
All times are GMT -4. The time now is 11:27 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy