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Top Forums UNIX for Dummies Questions & Answers Print line with highest value from one column Post 302534427 by dliving3 on Tuesday 28th of June 2011 01:44:38 AM
Old 06-28-2011
Print line with highest value from one column

Hi everyone,

This is my first post, but I have already received a lot of help from the forums in the past. Thanks!

I've searched the forums and my question is very similar to an earlier post entitled "Printing highest value from one column", which I am apparently not yet allowed to post a link to (only 4 more posts until I can spam!!Smilie).

My problem is that I have more columns, and want the whole line printed. For the example:

Line ID Sort Extra Extra2
1 A 3 4 3
2 A 1 2 1
3 A 2 3 2
4 A 1 1 1
5 B 1 1 1
6 B 1 2 1
7 B 3 3 3
8 C 1 1 1
9 D 3 1 3
10 E 3 1 3
11 E 3 2 3

I want to print one line for every unique ID value that has the highest value in Sort. Giving the output:

Line ID Sort Extra Extra2
1 A 3 4 3
7 B 3 3 3
8 C 1 1 1
9 D 3 1 3
11 E 3 2 3

If the sort value is equal for any given ID, I don't really care which is returned as in ID=E.

Franklin52's answer (modified for my data) in the previous post mentioned was close:
Code:
 awk 'a[$2] < $3{a[$2]=$3} END{for(i in a){print i, a[i]}}' file

However, I can't seem to get it to print the whole line. Please let me know what I am missing!

Thanks in advance!
 

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TRACETOPENDS(1) 						   User Commands						   TRACETOPENDS(1)

NAME
tracetopends - reports the endpoints that are responsible for the most traffic in a trace SYNOPSIS
tracetopends [ -f bpf ] [ -A addrtype ] [ -s ] [ -d ] [ -b ] [ -a ] [ -p ] [ -n topcount ] inputuri [inputuri ...] DESCRIPTION
tracetopends reports the number of bytes and packets sent and received by the busiest endpoints observed in the input trace(s). -f bpf filter Output only packets that match tcpdump style bpf filter. -n top count Report the top N endpoints (defaults to 10). -A address type Specifies how an endpoint should be defined. Suitable options are "mac", "v4" and "v6" which will report endpoint stats for each observed MAC address, IPv4 address and IPv6 address respectively. -s Sort endpoints based on the amount of outgoing traffic (will cancel any previous -d option. This is on by default. -d Sort endpoints based on the amount of incoming traffic (will cancel any previous -s option. -b Sort endpoints based on the amount of IP traffic (will cancel any previous -a or -p options. This is on by default. -a Sort endpoints based on the amount of application layer traffic (will cancel any previous -b or -p options. -p Sort endpoints based on the amount of packets (will cancel any previous -b or -a options. OUTPUT
Output is written to stdout in columns separated by blank space. The columns are (in order): * Endpoint address * Time last observed * Packets originating from the endpoint * Bytes originating from the endpoint (IP header onwards) * Payload originating from the endpoint (post transport header) * Packets sent to the endpoint * Bytes sent to the endpoint (IP header onwards) * Payload sent to the endpoint (post transport header) EXAMPLES
Find the IPv4 addresses that are sending the most traffic. tracetopends -A v4 -b -s erf:trace.erf.gz LINKS
More details about tracetopends (and libtrace) can be found at http://www.wand.net.nz/trac/libtrace/wiki/UserDocumentation SEE ALSO
libtrace(3), tracemerge(1), tracefilter(1), traceconvert(1), tracesplit_dir(1), tracereport(1), tracertstats(1), tracestats(1), tracepkt- dump(1), traceanon(1), tracesummary(1), tracereplay(1), tracediff(1), traceends(1) AUTHORS
Shane Alcock <salcock@cs.waikato.ac.nz> tracetopends (libtrace) September 2011 TRACETOPENDS(1)
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