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Top Forums Shell Programming and Scripting Add the values in second and third columns with group by on first column. Post 302770018 by pamu on Thursday 14th of February 2013 07:31:40 AM
Old 02-14-2013
Quote:
Originally Posted by angshuman
I just need to make a small change to it so that the last filed in the out put always displays two decimal places.
try this..

Code:
awk -F "|" '{A[$1]+=$2;B[$1]+=$3;}END{for(i in A){printf "%s|%s|%0.02f\n", i,A[i],B[i]}}' file

Quote:
Originally Posted by angshuman
May I request your help on this and can I request you to explain the code?
Code:
awk -F "|" '{    # Define | as a Field Separator
A[$1]+=$2;        # Add $2 to the array A having index of $1
B[$1]+=$3;}        # Add $3 to the array B having index of $1
END{for(i in A)    # Get all the indexes of array A in i

{printf "%s|%s|%0.02f\n", i,A[i],B[i]}}' file        # Print i(means $1),A[i](means sum of all $2 for the particular $1),B[i](means sum of all $3 for the particular $1). Used 0.02f here for floating purpose.

Hope this helps you.

Regards,

pamu
 

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COLUMN(1)						    BSD General Commands Manual 						 COLUMN(1)

NAME
column -- columnate lists SYNOPSIS
column [-ntx] [-c columns] [-s sep] [file ...] DESCRIPTION
The column utility formats its input into multiple columns. Rows are filled before columns. Input is taken from file operands, or, by default, from the standard input. Empty lines are ignored. The options are as follows: -c Output is formatted for a display columns wide. -s Specify a set of characters to be used to delimit columns for the -t option. -t Determine the number of columns the input contains and create a table. Columns are delimited with whitespace, by default, or with the characters supplied using the -s option. Useful for pretty-printing displays. -x Fill columns before filling rows. -n By default, the column command will merge multiple adjacent delimiters into a single delimiter when using the -t option; this option disables that behavior. This option is a Debian GNU/Linux extension. ENVIRONMENT
The COLUMNS, LANG, LC_ALL and LC_CTYPE environment variables affect the execution of column as described in environ(7). EXIT STATUS
The column utility exits 0 on success, and >0 if an error occurs. EXAMPLES
(printf "PERM LINKS OWNER GROUP SIZE MONTH DAY " ; printf "HH:MM/YEAR NAME " ; ls -l | sed 1d) | column -t SEE ALSO
colrm(1), ls(1), paste(1), sort(1) HISTORY
The column command appeared in 4.3BSD-Reno. BUGS
Input lines are limited to LINE_MAX (2048) bytes in length. BSD
July 29, 2004 BSD
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