Common values in 2 columns in 2 files


 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting Common values in 2 columns in 2 files
# 1  
Old 06-13-2013
Common values in 2 columns in 2 files

Hello,

Suppose I have these 2 tab delimited files, where the second column in first file contains matching values from first column of the second file, I would like to get an output like this:

File A

Code:
1    A
2    B
3    C

File B

Code:
A    Apple
C    Cinnabon
B    Banana

I would like an output like this:

Code:
1   Apple
2   Banana
3   Cinnabon

I can write a script for this, but I would like to know how to make it in awk or perl in one line..

Thanks,
Mohamed
# 2  
Old 06-13-2013
In awk you could:

Code:
awk 'FNR==NR{v[$1]=$2;next}{print $1"\t"v[$2]}' fileB fileA

or

Code:
awk 'FNR==NR{v[$1]=$2;next}$2=v[$2]' OFS='\t' fileB fileA

Depending on if a line should be output if no match is found from fileB
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Paste columns based on common column: multiple files

Hi all, I've multiple files. In this case 5. Space separated columns. Each file has 12 columns. Each file has 300-400K lines. I want to get the output such that if a value in column 2 is present in all the files then get all the columns of that value and print it side by side. Desired output... (15 Replies)
Discussion started by: genome
15 Replies

2. UNIX for Dummies Questions & Answers

Merge selective columns from files based on common key

Hi, I am trying to selectively merge two files based on keys reported in the 1st column. File1: #file1-header1 file1-header2 111 qwe rtz uio 198 asd fgh jkl 165 yxc 789 poi uzt rew 89 lkj File2: #file2-header2 file2-header2 165 ghz nko2 ... (2 Replies)
Discussion started by: dovah
2 Replies

3. Linux

Comapring columns in 2 files and printing the values that differ.

I have a file (file-1) that looks like this, DIP-10097N|refseq:NP_416170|uniprotkb:P30015 DIP-10117N|refseq:NP_414973|uniprotkb:P08177 DIP-10168N|refseq:NP_418766|uniprotkb:P15005 DIP-10199N|refseq:NP_415632|uniprotkb:P30958 DIP-10358N|refseq:NP_418659|uniprotkb:P28903... (4 Replies)
Discussion started by: Syeda Sumayya
4 Replies

4. Shell Programming and Scripting

Get both common and missing values from multiple files

Hi, I have 5 files with two columns. I need to merge all the 5 files based on column 1. If any of them are missing then corresponding 2nd column should be substituted by missing value. I know hoe to do this for 2 files. but how can I implement for 5 files. I tried this based on 5 files but it... (2 Replies)
Discussion started by: Diya123
2 Replies

5. Shell Programming and Scripting

Compare multiple files, identify common records and combine unique values into one file

Good morning all, I have a problem that is one step beyond a standard awk compare. I would like to compare three files which have several thousand records against a fourth file. All of them have a value in each row that is identical, and one value in each of those rows which may be duplicated... (1 Reply)
Discussion started by: nashton
1 Replies

6. Shell Programming and Scripting

Two columns-Common records - 20 files

Hi Friends, I have an input file like this cat input1 x 1 y 2 z 3 a 2 b 4 c 6 d 9 cat input2 x 7 h 8 k 9 l 5 m 9 d 12 (5 Replies)
Discussion started by: jacobs.smith
5 Replies

7. Shell Programming and Scripting

Find Common Values Across Two Files

Hi All, I have two files like below: File1 MYFILE_28012012_1112.txt|4 MYFILE_28012012_1113.txt|51 MYFILE_28012012_1114.txt|57 MYFILE_28012012_1115.txt|57 MYFILE_28012012_1116.txt|57 MYFILE_28012012_1117.txt|57 File2 MYFILE_28012012_1110.txt|57 MYFILE_28012012_1111.txt|57... (2 Replies)
Discussion started by: angshuman
2 Replies

8. Shell Programming and Scripting

Parsing common values across multiple files

Hi All, I have multiple (5+) text files with single columns and I would like to grep the common values across all the text files and parse it to a new file. All the values are numerical. Please let me know how to do it using awk. (6 Replies)
Discussion started by: Lucky Ali
6 Replies

9. Shell Programming and Scripting

Sum up values of columns in 4 files using shell script

I am new to shell script.I have records like below in 4 different files which have about 10000 records each, all records unique and sorted based on column 2. 1 2 3 4 5 6 --------------------------- SR|1010478|000044590|1|0|0| SR|1014759|000105790|1|0|0| SR|1016609|000108901|1|0|0|... (2 Replies)
Discussion started by: reach.sree@gmai
2 Replies

10. Solaris

Comparing the common columns of a table in two 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 BOOKS COUNT: 40 BOOKS AUTHOR1 SUM:1018 MAX:47 MIN:1 AVG:25.45 BOOKS AUTHOR3 SUM:181 MAX:48 MIN:3 AVG:18.1 Note:Read it as Table columnname sum(column) max(column) min(column)... (1 Reply)
Discussion started by: ragavhere
1 Replies
Login or Register to Ask a Question