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Shell Programming and Scripting

How to add a particular column alone in a file

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Top Forums Shell Programming and Scripting How to add a particular column alone in a file
# 22  
Old 06-24-2009
i tried the code which you have pasted above, but still the same error continues, first line has only sum and not all the fields.
# 23  
Old 06-24-2009
given a sample file - cute.txt:
Code:
ashop0004 SQL- 06/14/2009 06/14/2009 00:04:28
ashop0004 SQL- 06/14/2009 06/14/2009 00:00:37 928
ashop0004 SQL- 06/14/2009 06/14/2009 00:00:32 4768
ashop0004 SQL- 06/14/2009 06/14/2009 00:00:39 1376
ashop0004 SQL- 06/14/2009 06/14/2009 00:00:33 672
ashop0004 SQL- 06/14/2009 06/14/2009 00:00:43
ashop0004 SQL- 06/14/2009 06/14/2009 00:00:43 544
ashop0004 SQL- 06/14/2009 06/14/2009 00:00:43 544
ashop0004 SQL- 06/14/2009 06/14/2009 00:00:43 1056
ashop0004 SQL- 06/14/2009 06/14/2009 00:00:43 1056
ashop0004 SQL- 06/14/2009 06/14/2009 00:00:43
ashop0004 SQL- 06/14/2009 06/14/2009 00:00:43 1056
ashop0004 SQL- 06/14/2009 06/14/2009 00:00:43 1056
ashop0004 SQL- 06/14/2009 06/14/2009 00:00:43
ashop0004 SQL- 06/14/2009 06/14/2009 00:00:43 1056
ashop0004 SQL- 06/14/2009 06/14/2009 00:00:43 544

nawk -f cute.awk cute.txt

produces:
Code:
ashop0004 SQL- 06/14/2009 06/14/2009 00:04:28  7744
ashop0004 SQL- 06/14/2009 06/14/2009 00:00:43  3200
ashop0004 SQL- 06/14/2009 06/14/2009 00:00:43  2112
ashop0004 SQL- 06/14/2009 06/14/2009 00:00:43  1600

cute.awk - as posted previously:
Code:
# if the number of fields is 6
NF == 6 {
   # add to running tally of sum the value of the last (NF) field
   sum+=$NF
   # concatenate the current line to the running record of the previously encountered lines of 6 fields
   rec=(rec)?rec ORS $0 :$0
   # go to the NEXT line
   next
}
{
   # if the running record (rec) is NOT empty
   if (rec) {
   # print the 'summary line' (the line with 5 fields) followed by the sum
   # (sum) and followed by ORS (new line by default)
     print sumLine OFS sum
   }

   # reset the sum to 0 and rec to empty string
   sum=0; rec=""
   # assign the current line ($0) to a variable sumLine
   sumLine=$0
}
END {

# take of the trailing record - same logic as before
  if (rec)
    print sumLine OFS sum
}
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