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number of occurences of a string

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# 8  
Old 12-04-2006
try this
awk '
BEGIN {
s=0;}
{
for (i=1;i<=length($0);i++)
{
if(substr($0,i,4) == "nasa")
s=s+1;
}
}
END{
printf("no of occurences=%d\n",s)
}
' file
# 9  
Old 12-04-2006
grep -i "welcome to unix forum" test | wc -w

Note: test is a file name.
satya009
# 10  
Old 12-04-2006
Quote:
Originally Posted by satya009
grep -i "welcome to unix forum" test | wc -w

Note: test is a file name.
This will not give what the OP had requested for Smilie
Code:
>cat txt
good one good
good
good one best
>grep -i good txt | wc -w
7

wc -w in turn would count all the words from the output,
in the above case only the selected pattern is not displayed to count.
# 11  
Old 12-04-2006
Try...
Code:
gawk 'BEGIN{RS="[^[:alnum:]]"}/nasa/{s+=1}END{print s}' file

# 12  
Old 12-04-2006
cs u r right
Last edited by jambesh; 12-05-2006 at 09:14 AM..
# 13  
Old 12-05-2006
hi
hi jambesh

I think grep -c returns only the number of lines for the welcome to unix forum not the number of occurences.


Regards,
cskumar.
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