[ale] Awk question

[Erik Mathis]

awk '{sum+=$2} END {print sum}' filename
310
awk '{subt-=$2} END {print subt}' filename
-310

Stolen and hacked from http://www.commandlinefu.com

-Erik-

On Fri, Feb 3, 2012 at 1:51 PM, Randy Ramsdell <rramsdell at activedg.com> wrote:
> I need to parse a file and then subtract next to last line field $2
> from the last line field $2 using awk and then convert this number to a
> percent.
>
> Data:
>
> $date 100
> $date 103
> $date 107
>
> So ... ( 107 - 103 ) / 103 ...
>
> Clues?
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