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Full Discussion: Average, min and max in file with header, using awk
Top Forums Shell Programming and Scripting Average, min and max in file with header, using awk Post 302771304 by RudiC on Wednesday 20th of February 2013 08:42:12 AM
Old 02-20-2013
Well, you're on the right track, just need to get your ducks in a row. Look at this an adapt to your needs:
Code:
awk     'NR==1  {max=0;min=1}
         NR>1   {sum+=$6
                 if (min>$6) min=$6
                 if (max<$6) max=$6
                 cnt = NR
                }
         END    {print  sum/(cnt-1), min, max}
        ' file
0.0113093 0.003118 0.01961

Some further reading on awk might be really helpful.
This User Gave Thanks to RudiC For This Post:
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LEARN ABOUT DEBIAN

gedcom::grammar

Gedcom::Grammar(3pm)					User Contributed Perl Documentation				      Gedcom::Grammar(3pm)

NAME

       Gedcom::Grammar - a module to manipulate Gedcom grammars

       Version 1.16 - 24th April 2009

SYNOPSIS

	 use Gedcom::Grammar;

	 my $st = $grammar->structure("GEDCOM");
	 my @sgr = $grammar->item("DATE");
	 my @items = $grammar->valid_items;
	 my $min = $grammar->min;
	 my $max = $grammar->max;
	 my @items = $grammar->items;

DESCRIPTION

       A selection of subroutines to handle the grammar of a gedcom file.

       Derived from Gedcom::Item.

HASH MEMBERS

       Some of the more important hash members are:

   $grammar->{top}
       The top of the grammar tree.

   $grammar->{top}{structures}
       A reference to a hash mapping the names of all structures to the grammar objects.

METHODS

   structures
	 my $st = $grammar->structure("GEDCOM");

       Return the grammar item of the specified structure, if it exists, or undef.

   item
	 my @sgr = $grammar->item("DATE");

       Return a list of the possible grammar items of the specified sub-item, if it exists.

   min
	 my $min = $grammar->min;

       Return the minimum permissible number of $grammar items

   max
	 my $max = $grammar->max;

       Return the maximum permissible number of $grammar items

   items
	 my @items = $grammar->items;

       Return a list of tags of the grammar's sub-items

   valid_items
	 my @items = $grammar->valid_items;

       Return a hash detailing all the valid sub-items of the grammar item.  The key is the tag of the sub-item and the value is an array of
       hashes with three members:

	 grammar => the sub-item grammar
	 min	 => the minimum permissible number of these sub-items
	 max	 => the maximum permissible number of these sub-items

perl v5.14.2							    2012-04-12						      Gedcom::Grammar(3pm)
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