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Full Discussion: Need help with AWK math
Top Forums Shell Programming and Scripting Need help with AWK math Post 302630841 by brianjb on Thursday 26th of April 2012 10:47:31 AM
Old 04-26-2012
Need help with AWK math
I am trying to do some math, so that I can compare the average of six numbers to a variable.

Here is what it looks like (note that when I divide really big numbers, it isn't a real number):

Code:
[@ns1 ~]$ tail -n 6 named.stats | awk -F\, '{print$1}'
1141804
1140566
1139429
1134210
1084682
895045
[@ns1 ~]$ tail -n 6 named.stats | awk -F\, '{print$1}' | awk '{ sum+=$1} END {print sum/6}'
1.08929e+06

But if I calculate smaller numbers:
Code:
[@ns1 ~]$ tail -n 6 named.stats | awk -F\, '{print$1}'
2
3452
459
7772
442
10
[@ns1 ~]$ tail -n 6 named.stats | awk -F\, '{print$1}' | awk '{ sum+=$1} END {print sum/6}'
2022.83

Any suggestions? Will it work like that?

Here is how I am comparing:

Code:
MAX=`echo 700000`
LASTINV=`tail -n 1 $QLOG | awk -F\, '{print $1}'`
LASTHOUR=`tail -n 6 $QLOG | awk -F\, '{print $1}' | awk '{ sum+=$1} END {print sum/6}'`

CHANGE=`echo "$LASTINV $LASTHOUR" | awk '{if (($1/$2) > 5) {print "EXCEED";} else {print "NOMINAL";}}'`
      if [ "$CHANGE" = "EXCEED" ]
      then

Here is what the variables look like, for example:

Code:
[@ns1 ~]$ tail -n 1 named.stats
10,24-Apr-2012,19:50

LASTINV:
[@ns1 ~]$ tail -n 1 named.stats | awk -F\, '{print $1}'
10

[@ns1 ~]$ tail -n 6 named.stats
1141804,24-Apr-2012,19:00
1140566,24-Apr-2012,19:10
1139429,24-Apr-2012,19:20
1134210,24-Apr-2012,19:30
1084682,24-Apr-2012,19:40
895045,24-Apr-2012,19:50


I hope I have given you enough to help me.

I appreciate your help!
 

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LEARN ABOUT REDHAT

igawk

IGAWK(1)							 Utility Commands							  IGAWK(1)

NAME

       igawk - gawk with include files

SYNOPSIS

       igawk [ all gawk options ] -f program-file [ -- ] file ...
       igawk [ all gawk options ] [ -- ] program-text file ...

DESCRIPTION

       Igawk is a simple shell script that adds the ability to have ``include files'' to gawk(1).

       AWK programs for igawk are the same as for gawk, except that, in addition, you may have lines like

	      @include getopt.awk

       in your program to include the file getopt.awk from either the current directory or one of the other directories in the search path.

OPTIONS

       See gawk(1) for a full description of the AWK language and the options that gawk supports.

EXAMPLES

       cat << EOF > test.awk
       @include getopt.awk

       BEGIN {
	    while (getopt(ARGC, ARGV, "am:q") != -1)
		 ...
       }
       EOF

       igawk -f test.awk

SEE ALSO

       gawk(1)

       Effective AWK Programming, Edition 1.0, published by the Free Software Foundation, 1995.

AUTHOR

       Arnold Robbins (arnold@skeeve.com).

Free Software Foundation					    Nov 3 1999								  IGAWK(1)
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