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Full Discussion: AWK : Add Fields of lines with matching field
Top Forums Shell Programming and Scripting AWK : Add Fields of lines with matching field Post 302488273 by m.d.ludwig on Sunday 16th of January 2011 12:29:55 PM
Old 01-16-2011
The awk script:
Code:
{ l[NR] = $1; n[$1]++; s[$1] += $2; }
END {
  for (i in n) { a[i] = s[i] / n[i]; }
  for (i = 1; i <= NR; i++) { print l[i], a[l[i]]; }
}

Results in:
Code:
Test1 7.5
Test1 7.5
Test2 6.66667
Test2 6.66667
Test2 6.66667
Test3 4

You can adjust the print to get the numeric precision you need.
This User Gave Thanks to m.d.ludwig For This Post:
DerSeb
 

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LEARN ABOUT REDHAT

igawk

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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