CODEWITHSUNDEEP
awk
user2106584
user2106584

Reputation: 13

How do I count the number of times a string appears in a column?

I have text files with 3 columns and I want to count the the number of each string appears in column 2.

The second column of file1:

SAM
MATHEW
ALAN
NEELA
JOHN

The second column of file2:

ALAN
NEELA
KAREEM
MOHA

Desired output:

SAM-1
MATHEW-1
ALAN-2
NEELA-2
JOHN-1
KAREEM-1
MOHA-1

Upvotes: 0

Views: 668

Answers (3)

Thor
Thor

Reputation: 47249

This would accomplish it, although the output is unordered:

awk '{ h[$2]++ } END { for(k in h) print k " - " h[k] }' file1 file2

A tally is kept in the h associative array, and when all files have been processed the results are printed in the END block.

Upvotes: 1

Vijay
Vijay

Reputation: 67319

awk '{a[$2]++;next}END{for(i in a)print i"-"a[i]}' file1 file2

tested:

> cat file1
10993   item    0
11002   item    6
693661  item    7
> cat file2
10993   item    0
11002   item1   6
693661  item2   7
> awk '{a[$2]++;next}END{for(i in a)print i"-"a[i]}' file1 file2
item1-1
item2-1
item-4
>

Upvotes: 0

Chris Seymour
Chris Seymour

Reputation: 85913

$ awk '{a[$2]++}END{for(k in a)print k"-"a[k]}' file1 file2
MOHA-1
NEELA-2
JOHN-1
KAREEM-1
ALAN-2
MATHEW-1
SAM-1

Upvotes: 2

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