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Full Discussion: Awk product of nth field
Top Forums Shell Programming and Scripting Awk product of nth field Post 302699997 by madhavb on Wednesday 12th of September 2012 07:33:01 PM
Old 09-12-2012
Awk product of nth field
How do I do the product of nth filed just like sum. For sum I know like
Code:
awk '{ sum += $12 } END {printf "%.2f\n", sum}'

works as initial sum = 0.

But for product how do initialize the variable to 1?
Last edited by Franklin52; 09-13-2012 at 05:23 AM.. Reason: Please use code tags for data and code samples
 

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LEARN ABOUT LINUX

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/>
       Report sum translation bugs to <http://translationproject.org/team/>

COPYRIGHT

       Copyright (C) 2010 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 8.5						   February 2011							    SUM(1)
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