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Full Discussion: Average of a column in multiple files
Top Forums Shell Programming and Scripting Average of a column in multiple files Post 302704467 by radoulov on Friday 21st of September 2012 03:59:08 PM
Old 09-21-2012
Code:
awk 'END { print sum / fnr > fn }
NR > 1 && FNR == 1 {
  print sum/fnr > fn
  close(fn)
  sum = x
  }
{ 
  sum += $5 
  fnr = FNR
  fn = "avg_" FILENAME
  }' stat.*

With GNU awk in most cases you don't need to bother with closing the output files.
 

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LEARN ABOUT SUSE

sum

SUM(1)								   User Commands							    SUM(1)

NAME

       sum - checksum and count the blocks in a file

SYNOPSIS

       sum [OPTION]... [FILE]...

DESCRIPTION

       Print checksum and block counts for each FILE.

       -r     use BSD sum algorithm, use 1K blocks

       -s, --sysv
	      use System V sum algorithm, use 512 bytes blocks

       --help display this help and exit

       --version
	      output version information and exit

       With no FILE, or when FILE is -, read standard input.

AUTHOR

       Written by Kayvan Aghaiepour and David MacKenzie.

REPORTING BUGS

       Report sum bugs to bug-coreutils@gnu.org
       GNU coreutils home page: <http://www.gnu.org/software/coreutils/>
       General help using GNU software: <http://www.gnu.org/gethelp/>

COPYRIGHT

       Copyright (C) 2009 Free Software Foundation, Inc.  License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
       This is free software: you are free to change and redistribute it.  There is NO WARRANTY, to the extent permitted by law.

SEE ALSO

       The  full  documentation  for sum is maintained as a Texinfo manual.  If the info and sum programs are properly installed at your site, the
       command

	      info coreutils 'sum invocation'

       should give you access to the complete manual.

GNU coreutils 7.1						     July 2010								    SUM(1)
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