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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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GPIV_HDF2PIV(1) 					      General Commands Manual						   GPIV_HDF2PIV(1)

NAME
gpiv_hdf2piv - Converts HDF5 PIV-data to ASCII data. SYNOPSIS
gpiv_hdf2piv [-e] [-h | --help] [-p | --print] [-v | --version] filename DESCRIPTION
gpiv_hdf2piv converts a HDF5 formatted file filename.hdf, containing PIV-data, PIV derived data, like vorticities, strain etc to (ASCII formatted) filename.piv., filename.vor, filename.sstr, filename.nstr and, eventually, image(s) to (PNG formatted) filename.png files. The parameters that have been used for the analysis and post processing are written to filename.par This program does not use the parameter resources from libgpiv. The parameters may be defined by the command line options as explained below. Options -e Exclude PIV data and data from post-processes. Only convert image data. -h | --help On-line help. -p | --print Prints parameters, command line options and input and output filenames to stdout. The output may be used as parameters of fasty for future use by re-directing stdout to fasty.par. -v | --version Print version information on standard output, then exits successfully. filename Full input file name, hdf formatted (including .hdf extension) SEE ALSO gpivtools AUTHOR
Gerber Van der Graaf 19 Januari 2005 GPIV_HDF2PIV(1)
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