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Top Forums Shell Programming and Scripting Sum of three columns - in 4N columns file Post 302385057 by ahmad.diab on Thursday 7th of January 2010 02:57:34 AM
Old 01-07-2010
Quote:
Originally Posted by alister
Hi, f_o_555:

As i understand the problem, ahmad.diab's solution is incorrect but it did make me realize that i was over-engineering. A simpler approach inspired by his post (the only advantage of the modulus-based solution above is that it can readily handle MxN, and not just 4xN, if the hardcoded 4 is parameterized).

The following gives the same output given the same sample data files (data3 and data4) used above.

Code:
$ awk '/^[0-9]/ && $1==0 && (N=NF/4) { for (i=1;i<=N;i++) $i=sprintf("%.4E", $(N+i)+$(2*N+i)+$(3*N+i))} -3' OFS='\t' data

alister
the number of columns is 4*N not only "N" as in alister code above and as f_o_555 mention in his post below.

Quote:
Originally Posted by alister
I have a file with 4xN columns like
So we need f_o_555 to decide what is the number of columns need to be proceed in the for loop ? is it N or 4*N (NF)

BR
SmilieSmilieSmilie
 

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netris-sample-robot(6)						Netris Sample Robot					    netris-sample-robot(6)

NAME
netris-sample-robot - sample robot for netris SYNOPSIS
netris-sample-robot [-l] DESCRIPTION
The netris-sample-robot is a sample implementation of the robot protocol. It plays quite well but isn't too hard to beat. The robot should be started from netris with the option -r to connect or wait for another player to join. You can also let two robots play against each other in that way, if you like. OPTIONS
-l Writes some log information into the file log in the current working directory. If it can't it bails out. EXAMPLES
To start the netris-sample-robot waiting for another connection with logfile use the following line: netris -w -r 'netris-sample-robot -l' You then just have to start netris somewhere else which connects to that robot. SEE ALSO
netris(6) BUGS
One known bug of the netris-sample-robot is that it hangs quite often. This was already filed as a bugreport against the package so please refrain from doing so again. If you have an idea why this happens or know a solution how to fix it feel free to mail us. AUTHORS
Netris was written by Mark H. Weaver <mhw@netris.org>. This manual page was written by Gerfried Fuchs <alfie@debian.org> for the Debian GNU/Linux system (but may be used by others). 0.5 16 Feb 2002 netris-sample-robot(6)
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