How to grep number of occurrence of two different words e.g. 'register' and 'evn' in a file on Linux ?
The output should be like following:
registered:20
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3You should clarify the requirements. 1) Multiple occurrences of a word on the same line should be counted as 1 (as in McNisse's answer) or should count each (as in my answer)? 2) All words with the same base should be counted (as in dchirikov's answer) or only exact matches (as in my answer). – manatwork Jan 09 '13 at 11:37
5 Answers
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In case reversed output format (count first, word after) is also acceptable, this does it too and is easy to add more words:
tr -c '[:alpha:]' '\n' < /path/to/file | sort | uniq -c | grep -w 'register\|evn'
- Counts each word occurrence, even if there are multiple occurrences in the same line.
- Counts exact matches of the words, not including the suffixed variants.
manatwork
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Use awk
awk '/register/ {r++} /evn/ {e++} END {printf("register:%d\nevn:%d\n", r, e)}' /path/to/file
McNisse
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You can calculate it separately:
$ word=register; count=`grep -o $word /path/to/file| wc -l`; echo $word:$count
$ word=evn; count=`grep -o $word /path/to/file| wc -l`; echo $word:$count
dchirikov
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@McNisse Actually, you do because grep will only count line occurrences and there may be more than one occurrence of a word in a line. – mchid Oct 16 '17 at 13:41
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example file ./filename:
registering evn register evn
evn register evn.register. register.evn evn evn register.
evn register-evnt register
command:
echo register:$(grep -oP "(^|\s)\Kregister(?=\s|$)|(^|\s)\Kregister\.(?=\s|$)" ./filename | wc -l) && echo evn:$(grep -oP '(^|\s)\Kevn(?=\s|$)|(^|\s)\Kevn\.(?=\s|$)' ./filename | wc -l)
example output:
register:4
evn:6
This should accurately count only the words "register" and "evn" while omitting occurrences of words containing "register" and or "evn" such as "registering", "evnt", or "register-evn" for example.
This assumes that there are no special characters like dashes immediately following either word but will include these words if they are followed by a period at the end of a line or sentence.
This linked answer gave me the info I needed for the grep syntax.
mchid
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word="registered"
echo $word:$( grep -wc $word /path/to/file )
Works with Bash/Ksh and GNU grep
Soumyadip DM
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