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Top Forums UNIX for Advanced & Expert Users merge two column multiple files into one Post 302589094 by binlib on Tuesday 10th of January 2012 09:26:24 PM
Old 01-10-2012
Code:
$ cat agg.awk
BEGIN { OFS = "\t" }
{
  if ($1 != last) {
    if (NR > 1) print last, a
    last = $1
    a = $2
  } else a = a ", " $2
}
END { print last, a }

$ join -t$'\t' -a1 -a2 -e- -j1 -o0,1.2,2.2 <(awk -f agg.awk f1) <(awk -f agg.awk f2) |
join -t$'\t' -a1 -a2 -e- -j1 -o0,1.2,1.3,2.2 - <(awk -f agg.awk f3)

This User Gave Thanks to binlib For This Post:
 

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IGAWK(1)							 Utility Commands							  IGAWK(1)

NAME
igawk - gawk with include files SYNOPSIS
igawk [ all gawk options ] -f program-file [ -- ] file ... igawk [ all gawk options ] [ -- ] program-text file ... DESCRIPTION
Igawk is a simple shell script that adds the ability to have ``include files'' to gawk(1). AWK programs for igawk are the same as for gawk, except that, in addition, you may have lines like @include getopt.awk in your program to include the file getopt.awk from either the current directory or one of the other directories in the search path. OPTIONS
See gawk(1) for a full description of the AWK language and the options that gawk supports. EXAMPLES
cat << EOF > test.awk @include getopt.awk BEGIN { while (getopt(ARGC, ARGV, "am:q") != -1) ... } EOF igawk -f test.awk SEE ALSO
gawk(1) Effective AWK Programming, Edition 1.0, published by the Free Software Foundation, 1995. AUTHOR
Arnold Robbins (arnold@skeeve.com). Free Software Foundation Nov 3 1999 IGAWK(1)
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