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Top Forums Shell Programming and Scripting awk processing of variable number of fields data file Post 302874473 by CarloM on Friday 15th of November 2013 10:20:41 AM
Old 11-15-2013
You could check explicitly check for every 4th line:
Code:
awk '
NR%4==0 { 4 columns stuff }
NR%4!=0 { 6 columns stuff}'

(EDIT: Or check NF==4/NF==6, as was suggested in a briefly-lived post Smilie)


Or just loop around the number of fields you actually have in each line:
Code:
awk '
{
   for (i=1;i<=NF;i++) {
      printf ("%12.8G ", $i*$i)
   }
   printf "\n"
}'


Last edited by CarloM; 11-15-2013 at 12:00 PM..
 

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COLRM(1)						    BSD General Commands Manual 						  COLRM(1)

NAME
colrm -- remove columns from a file SYNOPSIS
colrm [start [stop]] DESCRIPTION
The colrm utility removes selected columns from the lines of a file. A column is defined as a single character in a line. Input is read from the standard input. Output is written to the standard output. If only the start column is specified, columns numbered less than the start column will be written. If both start and stop columns are spec- ified, columns numbered less than the start column or greater than the stop column will be written. Column numbering starts with one, not zero. Tab characters increment the column count to the next multiple of eight. Backspace characters decrement the column count by one. ENVIRONMENT
The LANG, LC_ALL and LC_CTYPE environment variables affect the execution of colrm as described in environ(7). EXIT STATUS
The colrm utility exits 0 on success, and >0 if an error occurs. SEE ALSO
awk(1), column(1), cut(1), paste(1) HISTORY
The colrm command appeared in 3.0BSD. BSD
August 4, 2004 BSD
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