[ale] Awk question

[Randy Ramsdell]

Haven't had time to work on this. Spent much time on it and had to move 
on. Thanks for the replies so far. Now I just have to think 'floating 
point' but will at least get the formula down. I was simply trying to do 
this all in awk instead of the pipe everything to another program to 
handle the respective pieces.

On 02/07/2012 07:31 AM, Richard Bronosky wrote:
>
> You are right. That is why I sent my reply with the correct solution. 
> I was thinking that my emails were not getting to the list until Jim 
> replied to a post I made on another thread.
>
> On Feb 6, 2012 2:55 PM, "Geoffrey Myers" <lists at serioustechnology.com 
> <mailto:lists at serioustechnology.com>> wrote:
>
>     Erik Mathis wrote:
>     > awk '{sum+=$2} END {print sum}' filename
>     > 310
>     > awk '{subt-=$2} END {print subt}' filename
>     > -310
>
>     Seems to me that will total all the records.  The OP only want's the
>     last two as I recall.
>
>     >
>     > Stolen and hacked from http://www.commandlinefu.com
>     >
>     > -Erik-
>     >
>     > On Fri, Feb 3, 2012 at 1:51 PM, Randy Ramsdell
>     <rramsdell at activedg.com <mailto: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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>
>     --
>     Until later, Geoffrey
>
>     "I predict future happiness for America if they can prevent
>     the government from wasting the labors of the people under
>     the pretense of taking care of them."
>     - Thomas Jefferson
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