Visit The New, Modern Unix Linux Community


Print unique records in 2 columns using awk


 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting Print unique records in 2 columns using awk
# 1  
Print unique records in 2 columns using awk

Is it possible to print the records that has only 1 value in 2nd column.

Ex:

input

Code:
awex1   1
awex1   2
awex1   3
assww   1
ader34   1
ader34   2

output

Code:
assww   1

# 2  
Code:
awk '{a[$1]++;b[$1]=$0}END{for (i in a) if(a[i]==1) print b[i]}' input

# 3  
Code:
sort -k1,1 -k2rn file | awk 'p!=$1 && $2==1; {p=$1}'

# 4  
Please note that Scrutinizer's code assume that for a certain $1, the first value in the second column is 1, according to the example you gave.

If it happen that you have an input file like :
Code:
awex1   1
awex1   2
awex1   3
assww   5
ader34   1
ader34   2

And if you expect the output:
Code:
assww   5

You could then go for the line i proposed in post #2
# 5  
Not exactly, my code does not assume that the first value in the second columns is 1. It finds values in the first field that only have (a) line(s) with the value 1.
I guess it depends on what the OP means with "only 1 value" . Does he mean "only one value" or "only value 1"
# 6  
Quote:
Originally Posted by Scrutinizer
Not exactly, my code does not assume that the first value in the second columns is 1. It finds values in the first field that only have (a) line(s) with the value 1.
I guess it depends on what the OP means with "only 1 value" . Does he mean "only one value" or "only value 1"
Hi Scruti

I 100% agree with you : "only one value" or "only value 1" is not the same, that's why i pointed out the difference between our codes, eventhough i admit, maybe i explained it in a clumsy way Smilie

Last edited by ctsgnb; 11-04-2012 at 06:32 AM..

Previous Thread | Next Thread
Thread Tools Search this Thread
Search this Thread:
Advanced Search

Test Your Knowledge in Computers #539
Difficulty: Medium
In C, int x; creates an integer variable associated with the identifier x initialized to one .
True or False?

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Issue using awk to print min values for unique ids

I am using the following script to search for and print minimum values for each individual Fields (3-14) for each unique id (Field 1). But when the field contains a "-99.99" ( I am ignoring "-99.99") and when the minimum value is the first line of a new id (Field 1), the output does not print Field... (13 Replies)
Discussion started by: ncwxpanther
13 Replies

2. Shell Programming and Scripting

awk to print unique text in field before hyphen

Trying to print the unique values in $2 before the -, currently the count is displayed. Hopefully, the below is close. Thank you :). file chr2:46603668-46603902 EPAS1-902|gc=54.3 253.1 chr2:211471445-211471675 CPS1-1205|gc=48.3 264.7 chr19:15291762-15291983 NOTCH3-1003|gc=68.8 195.8... (3 Replies)
Discussion started by: cmccabe
3 Replies

3. Shell Programming and Scripting

awk to print unique text in field

I am trying to use awk to print the unique entries in $2 So in the example below there are 3 lines but 2 of the lines match in $2 so only one is used in the output. File.txt chr17:29667512-29667673 NF1:exon.1;NF1:exon.2;NF1:exon.38;NF1:exon.4;NF1:exon.46;NF1:exon.47 703.807... (5 Replies)
Discussion started by: cmccabe
5 Replies

4. Shell Programming and Scripting

Compare columns of multiple files and print those unique string from File1 in an output file.

Hi, I have multiple files that each contain one column of strings: File1: 123abc 456def 789ghi File2: 123abc 456def 891jkl File3: 234mno 123abc 456def In total I have 25 of these type of file. (5 Replies)
Discussion started by: owwow14
5 Replies

5. Shell Programming and Scripting

Print unique names in a specific column using awk

Is it possible to modify file like this. 1. Remove all the duplicate names in a define column i.e 4th col 2. Count the no.of unique names separated by ";" and print as a 5th col thanx in advance!! Q input c1 30 3 Eh2 c10 96 3 Frp c41 396 3 Ua5;Lop;Kol;Kol c62 2 30 Fmp;Fmp;Fmp ... (5 Replies)
Discussion started by: quincyjones
5 Replies

6. Shell Programming and Scripting

Print unique names in each row of a specific column using awk

Is it possible to remove redundant names in the 4th column? input cqWE 100 200 singapore;singapore AZO 300 400 brazil;america;germany;ireland;germany .... .... output cqWE 100 200 singapore AZO 300 400 brazil;america;germany;ireland (4 Replies)
Discussion started by: quincyjones
4 Replies

7. Shell Programming and Scripting

count the unique records based on certain columns

Hi everyone, I have a file result.txt with records as following and another file mirna.txt with a list of miRNAs e.g. miR22, miR123, miR13 etc. Gene Transcript miRNA Gar Nm_111233 miR22 Gar Nm_123440 miR22 Gar Nm_129939 miR22 Hel Nm_233900 miR13 Hel ... (6 Replies)
Discussion started by: miclow
6 Replies

8. Shell Programming and Scripting

awk print only select records from file2

Print only records from file 2 that do not match file 1 based on criteria of comparing column 1 and column 6 Was trying to play around with following code I found on other threads but not too successful Code: awk 'NR==FNR{p=$1;$1=x;A=$0;next}{$2=$2(A?A:",,,")}1' FS=~ OFS=~ file1 FS="*"... (11 Replies)
Discussion started by: sigh2010
11 Replies

9. Shell Programming and Scripting

awk : extracting unique lines based on columns

Hi, snp.txt CHR_A SNP_A BP_A_st BP_A_End CHR_B BP_B SNP_B R2 p-SNP_A p-SNP_B 5 rs1988728 74904317 74904318 5 74960646 rs1427924 0.377333 0.000740085 0.013930081 5 ... (12 Replies)
Discussion started by: genehunter
12 Replies

10. UNIX for Dummies Questions & Answers

AWK ??-print for fields within records in a file

Hello all, Would appreciate if someone can help me out on the following requirement. INPUT FILE: -------------------------- TPS REPORT abc def ghi jkl mon pqr stu vrs lll END OF TPS REPORT TPS REPORT field1 field2 field3 field4 field5 field6 (8 Replies)
Discussion started by: hyennah
8 Replies

Featured Tech Videos