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Here is a simple brute force awk script that I think does what you want:
awk '
FNR == NR {
for(i = ($2 + 1); i <= ($2 + 30); i++) r1to30[i]
r10[$2 + 10]
next
}
$4 in...

Hi Don, sorry for not being clear.
1. Sorry that was a sloppy way of showing sample data :o. It now has 4 columns

2. and 3. I need to compare all the rows of column 4 with all the rows of column...

Sorry for this noob question,
I have file with 4 columns like where columns 2 and 4 have numbers


a 55 k 3
b 59 l 3
c 79 m 277
d 255 n 277
e 257 o 267
f 267 p 287
g 290 q 287
h 290 r...

Thank you, very clever and concise. Sorry, I could not understand, if this A[i OFS $i]++ is creating another array.

Thank you so much RudiC, didn't know about this trick {freq[$i,i]++; Base[$i]}
I understand its taking your time, could I request you to explain above part a bit.

Best,

Amit

Hi All, here's a question from newbie

I have a data like this, which set of small DNA sequences separated by new line

GAATCCGGAAACAGCAACTTCAAANCA
GTNATTCGGGCCAAACTGTCGAA...

Thank you So much Scrutinizer, this works flawless. I got the loop but Could I ask you to please explain this part if ($i) $i+=$1}1 to me, thank you for your time

---------- Post updated at 07:01...

Hi everybody,
I am a complete novice and please forgive if its answered gazillion times

I have a file which looks like this
1 0 2 0 0 0 0 0
0 3 0 1 18 2 ...