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Need help with script (awk)

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# 1  
Old 02-16-2010
Need help with script (awk)
I have a file with the following data:

Code:
       169 00:00:00.676   N 
       174 00:00:00.696   r 
       182 00:00:00.728   S 
       191 00:00:00.764   ) 
       220 00:00:00.880   (t 
       237 00:00:00.948   T 
       256 00:00:01.024   t) 
       344 00:00:01.376   (p 
       349 00:00:01.396   P 
       354 00:00:01.416   p) 
       373 00:00:01.492   N 
       377 00:00:01.508   r 
       385 00:00:01.540   S 
       392 00:00:01.568   ) 
       423 00:00:01.692   (t 
       441 00:00:01.764   T 
       459 00:00:01.836   t) 
       549 00:00:02.196   (p 
       554 00:00:02.216   P 
       559 00:00:02.236   p)

Its repeated hundreds of times (N to p) ). I would like to extract the first field of the following lines (in order) which have the following in their third field:
S
)
(t

So for the first set of S ) (t i would like to have 182 191 220. And this process is repeated for all S ) (t in the input file.

So far all I have is awk '($3~/S/);' prints out all lines with S in the third field, but I need only the first field. Then there are the remaining two lines which have ) and (t of which I all need only the first fields.

Please assist. Thank you.
# 2  
Old 02-16-2010
Code:
awk '$3 ~ /^(S|\)|\(t)$/ {print $1}'

# 3  
Old 02-16-2010
Code:
$ awk '$3 ~ /^(S|\)|\(t)$/ { print $1 }' file1
182
191
220
385
392
423

# 4  
Old 02-16-2010
Thanks for the input. Script works fine on a small file with about 50 lines. When I try it on a file that has about 4000 lines or so, I get no output. Does awk have an issue with large text files?
# 5  
Old 02-16-2010
If you want to use perl

Code:
cat abc.txt  | perl -e 'while(<>){chomp; @cols = split("\t"); if ($cols[-1] =~ m/^(S|\)|\(t)$/){ print "$cols[0]\n";}}'

182
191
220
385
392
423

HTH,
PL
# 6  
Old 02-17-2010
I made the following change and it works:
($3 ~/^S|^\)|^\(t/)

---------- Post updated 02-17-10 at 11:57 AM ---------- Previous update was 02-16-10 at 10:53 PM ----------

Another follow up question:

Suppose the output of the above awk script stored in a file (file1). I then have a second file (file2) which has:
Code:
            182      0.435
            183     -0.285
            184     -0.690
            185     -0.625
            186     -0.510
            187     -0.325
            188     -0.220
            189     -0.200
            190     -0.195
            191     -0.200
            192     -0.205
            193     -0.210
            194     -0.220

When the first field of file1 and file2 match, I wanna print out the second field of file2. How to accomplish this?

EDIT: did some experimenting and this seems to do it:
awk 'NR==FNR{a[$1]=$1;next}a[$1] {print $2}'
Smilie
Last edited by slackjack; 02-17-2010 at 01:08 PM..
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