Average across multiple columns - awk Post: 302986146

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Top Forums Shell Programming and Scripting Average across multiple columns - awk Post 302986146 by Don Cragun on Sunday 20th of November 2016 11:05:04 PM

11-21-2016

Registered User

You didn't answer the question: "Will all lines for a given group be adjacent (as in your example), or will data for various groups be intermixed?" so I tried to write code that would work either way. Note that the order of the groups in the output from this is random. It uses two dimensional arrays to keep track of the sums and counts for each column and group. (If all lines for a group are adjacent, you could still use one-dimensional arrays and dump the data for each group when a new group is found.)

Given that both entries in the 3rd column for group ru are -9, I don't understand why you believe the output for that column for that group should be 2; the following code produces 0 in this case:

Code:

gawk '
BEGIN {	FS = OFS = ","
}
NR > 1 {for(i = 1; i <= 4; i++)
		if($i > 0) {
			s[i, $5] += $i
			++count[i, $5]
			group[$5]
		}
}
END {	for(g in group) {
		for(i = 1; i <= 4; i++)
			printf("%g%s", count[i, g] ? s[i, g] / count[i, g] : 0,
			    OFS)
		print g
	}
}' input.csv > average.csv

Using awk on macOS 10.12.1, I get the output:

Code:

0.005,25,0,3.6,ru
0.013,50,9,3.395,rd

in average.csv with the sample input.csv data you provided in post #3.

Don Cragun

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LEARN ABOUT REDHAT

groupdel

GROUPDEL(8)						      System Manager's Manual						       GROUPDEL(8)

NAME

       groupdel - Delete a group

SYNOPSIS

       groupdel group

DESCRIPTION

       The groupdel command modifies the system account files, deleting all entries that refer to group.  The named group must exist.

       You must manually check all filesystems to insure that no files remain with the named group as the file group ID.

CAVEATS

       You may not remove the primary group of any existing user.  You must remove the user before you remove the group.

FILES

       /etc/group - group information
       /etc/gshadow - secure group information

SEE ALSO

       chfn(1), chsh(1), passwd(1), groupadd(8), groupmod(8), useradd(8), userdel(8), usermod(8)

AUTHOR

       Julianne Frances Haugh (jockgrrl@ix.netcom.com)

																       GROUPDEL(8)

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