Match the columns between two files and output


 
Thread Tools Search this Thread
Top Forums UNIX for Dummies Questions & Answers Match the columns between two files and output
# 1  
Old 12-29-2015
Match the columns between two files and output

Hi Help,

I have two files namely a.txt and b.txt

a.txt looks like

Code:
a.txt
1 2 2
1 3 3
2 4 4
4 5 6
6 7 7

b.txt looks like,
Code:
b.txt
1 2 1
1 3 2
2 4 3
3 4 4
4 5 5
6 7 6

a.txt and b.txt are quite similar in the form that
Code:
$1 and $2 of both the files matches

. Also,b.txt has one extra line, line 4.
I would like to first remove that line completely and then the output should look like
Code:
$1 of a.txt,$2 of a.txt,$3 of a.txt,$4 of b.txt

.

Below is the output file.


Code:
op.txt
1 2 2 1
1 3 3 2
2 4 4 3
4 5 6 5
6 7 7 6

Please help.
Thanks.
# 2  
Old 12-29-2015
Code:
awk 'FNR==NR {a[$1,$2]=$0; next}($1,$2) in a {print a[$1,$2], $3}' a.txt b.txt > op.txt

This User Gave Thanks to Aia For This Post:
# 3  
Old 12-30-2015
Many thanks Aia :-)
 
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. UNIX for Beginners Questions & Answers

Data match 2 files based on first 2 columns matching only and join if match

Hi, i have 2 files , the data i need to match is in masterfile and i need to pull out column 3 from master if column 1 and 2 match and output entire row to new file I have tried with join and awk and i keep getting blank outputs or same file is there an easier way than what i am... (4 Replies)
Discussion started by: axis88
4 Replies

2. Shell Programming and Scripting

Match first two columns and average third from multiple files

I have the following format of input from multiple files File 1 24.01 -81.01 1.0 24.02 -81.02 5.0 24.03 -81.03 0.0 File 2 24.01 -81.01 2.0 24.02 -81.02 -5.0 24.03 -81.03 10.0 I need to scan through the files and when the first 2 columns match I... (18 Replies)
Discussion started by: ncwxpanther
18 Replies

3. Shell Programming and Scripting

Join two files combining multiple columns and produce mix and match output

I would like to join two files when two columns in each file matches with each other and then produce an output when taking multiple columns. Like I have file A 1234,ABCD,23,JOHN,NJ,USA 2345,ABCD,24,SAM,NY,USA 5678,GHIJ,24,TOM,NY,USA 5678,WXYZ,27,MAT,NJ,USA and file B ... (2 Replies)
Discussion started by: mady135
2 Replies

4. Shell Programming and Scripting

Match the columns between 2 files

I have two files I want to match ids in the 5th column of the file 1 with the first column of the file 2 and get the description for the matched ids as shown in the output sno nm no nm2 ID 1 cc 574372 yyyi |6810|51234| 2 bb 119721 nmjk |6810|51234|51179| ... (4 Replies)
Discussion started by: raj_k
4 Replies

5. Shell Programming and Scripting

Match two columns from two files and print output

Hello, I have two files which are of the following format File 1 which has two columns Protein_ID Substitution NP_997239 T53R NP_060668 V267M NP_058515 P856A NP_001206 T55M NP_006601 D371Y ... (2 Replies)
Discussion started by: nans
2 Replies

6. Shell Programming and Scripting

Match files based on either of the two columns awk

Dear Shell experts, I have 2 files with structure: File 1: ID and count head test_GI_count1.txt 1000094 2 10039307 1 10039641 1 10047177 11 10047359 1 1008555 2 10120302 1 10120672 13 10121776 1 10121865 32 And 2nd file: head Protein_gi_GeneID_symbol.txt protein_gi GeneID... (11 Replies)
Discussion started by: smitra
11 Replies

7. Shell Programming and Scripting

Match columns several files

Hey fellas! Here come my problem. I appreciate if you have a look at it. I have several files with following structure: file_1:1 21 4 45 file_2:2 31 4 153 6 341 and so on... and I have a 'reference' file look like this: File_ref:A 1 B 2 C 3 (5 Replies)
Discussion started by: @man
5 Replies

8. Shell Programming and Scripting

match two key columns in two files and print output (awk)

I have two files... file1 and file2. Where columns 1 and 2 of file1 match columns 1 and 2 of file2 I want to create a new file that is all file1 + columns 3 and 4 of file2 :b: Many thanks if you know how to do this.... :b: file1 31-101 106 0 92 31-101 106 29 ... (2 Replies)
Discussion started by: pelhabuan
2 Replies

9. UNIX for Dummies Questions & Answers

Two files; if cells match then copy over other columns

My current issue is dealing with two space delimited files. The first file has column 1 as the sample ID's, then columns 2 - n as the observations. The second file has column 1 as the sample ID's, column 2 as the mother ID's, column 3 as the father ID's, column 4 as the gender, and column 5... (3 Replies)
Discussion started by: Renyulb28
3 Replies

10. Shell Programming and Scripting

Match strings in two files and compare columns of both

Good Morning, I was wondering if anybody could tell me how to achieve the following, preferably with a little commenting for understanding. I have 2 files, each with multiple rows with multiple columns. I need to find each row where the value in column 1 of file 1 matches column 1... (10 Replies)
Discussion started by: GarciasMuffin
10 Replies
Login or Register to Ask a Question

Featured Tech Videos