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Top Forums Shell Programming and Scripting Selecting lines having same values for first two columns Post 302748871 by pamu on Thursday 27th of December 2012 04:17:58 AM
Old 12-27-2012
Quote:
Originally Posted by manojmalhotra13
Thanks for replying so quickly and providing me the desired solution.

I tried the solution provided by RudiC and Sathyaonunix. Both are providing me the solutions. I am looking into the script by Pamu ( I am finding it difficult to understand as my expertise in Unix is not good, so kindly give me some time.)

As regarding query raised by RudiC

(i) if the third column entries are identical, then only one row is to be retained in the original file.

(ii) values cannot be negative.

(iii) the lines without duplicate values to be retained in the orginal file as such.

Thank you once again.

Manoj
Thanks for providing above details.

As per your current requirement I've modified script lit bit.

Now please check.

Code:
awk 'NR==FNR{A[$1,$2]++; B[$1,$2]=B[$1,$2]?B[$1,$2]<$3?$3:B[$1,$2]:$3;next}
{if(A[$1,$2]>1){if(B[$1,$2]==$3){B[$1,$2]=0;print }else{print > "another_file"}}else{print }}' file file

A[$1,$2]++ # Increments the array index for $1 and $2.

B[$1,$2]=B[$1,$2]?B[$1,$2]<$3?$3:B[$1,$2]:$3 # Here we compare is $3 is greater than previous $3 for $1 and $2 and retain max value and assign it to B[$1,$2]

I hope this helps Smilie

pamu
This User Gave Thanks to pamu For This Post:
 

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COLORS(3)						   libbash colors Library Manual						 COLORS(3)

NAME
colors -- libbash library for setting tty colors. SYNOPSIS
colorSet <color> colorReset colorPrint [<indent>] <color> <text> colorPrintN [<indent>] <color> <text> DESCRIPTION
General colors is a collection of functions that make it very easy to put colored text on tty. The function list: colorSet Sets the color of the prints to the tty to COLOR colorReset Resets current tty color back to normal colorPrint Prints TEXT in the color COLOR indented by INDENT (without adding a newline) colorPrintN The same as colorPrint, but trailing newline is added Detailed interface description follows. Available colors: Green Red Yellow White The color parameter is non-case-sensitive (i.e. RED, red, ReD, and all the other forms are valid and are the same as Red). FUNCTIONS DESCRIPTIONS
colorSet <color> Sets the current printing color to color. colorReset Resets current tty color back to normal. colorPrint [<indent>] <color> Prints text using the color color indented by indent (without adding a newline). Parameters: <indent> The column to move to before start printing. This parameter is optional. If ommitted - start output from current cursor position. <color> The color to use. <color> The text to print. colorPrintN [<indent>] <color> The same as colorPrint, except a trailing newline is added. EXAMPLES
Printing a green 'Hello World' with a newline: Using colorSet: $ colorSet green $ echo 'Hello World' $ colorReset Using colorPrint: $ colorPrint 'Hello World'; echo Using colorPrintN: $ colorPrintN 'Hello World' AUTHORS
Hai Zaar <haizaar@haizaar.com> Gil Ran <gil@ran4.net> SEE ALSO
ldbash(1), libbash(1) Linux Epoch Linux
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