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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

distrib.pats

DISTRIB.PATS(5) 						File Formats Manual						   DISTRIB.PATS(5)

NAME

       distrib.pats - default values for Usenet Distribution header

DESCRIPTION

       The  file <pathetc in inn.conf>/distrib.pats is used to determine the default value of the Distribution header.	It consists of a series of
       lines; blank lines and lines beginning with a number sign (``#'') are ignored.  All other lines consist of  three  fields  separated  by  a
       colon:
	      weight:pattern:value

       The  first  field  is the weight to assign to this match.  If a newsgroup matches multiple lines, the line with the highest weight is used.
       This should be an arbitrary number greater than zero.  Unlike other INN files, the order of lines in this file is not important.

       The second field is the name of the newsgroup or a wildmat(3)-style pattern to specify a set of	newsgroups.   Multiple	patterns  are  not
       allowed.

       The third field is the value that should be used if this line is picked as the best match.  It can be an empty string.

       Programs such as inews(1) that process a user's posting should consult this file, typically by using the DDxxx routines, documented in lib-
       inn(3).	The intent is that all newsgroups to which an article is posted be used to index into this file, and the value	with  the  highest
       weight should be used as the value of the Distribution header, if none was specified.

HISTORY

       Written by Rich $alz <rsalz@uunet.uu.net> for InterNetNews.  This is revision 1.6, dated 1998/05/20.

SEE ALSO

       inews(1), inn.conf(5), libinn(3).

																   DISTRIB.PATS(5)
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