[ale] Awk question

[Lightner, Jeff]

Any time I need to do floating point in a script I pipe it to “bc –l”.   Maybe not the most elegant way to do things but it works.






________________________________
From: ale-bounces at ale.org [mailto:ale-bounces at ale.org] On Behalf Of Randy Ramsdell
Sent: Tuesday, February 07, 2012 8:28 AM
To: ale at ale.org
Subject: Re: [ale] Awk question

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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