Summing values in columns


 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting Summing values in columns
# 1  
Old 08-12-2011
Summing values in columns

Basically I have to process a text file which has been sorted this way:

John 12
John 13
John 10
John 900
Peter 20
Peter 30
Peter 32

The first column is a name, and the second an arbitrary value, both delimited by a space. How can I sum them up such that it would become:

John 935
Peter 82

Preferably, this should be done in awk. I have actually written a simple function in bash to do that but it was horribly inefficient:

Code:
while read rec; do
        name=`echo $rec | cut -f1 -d" "`
	value=`echo $rec | cut -f2 -d" "`
	if [ "$name" = "$old_name" ]; then
		let "total=total+value"
        #for the first iteration, we have no old_name to print
	elif [ "$old_name" = "" ]; then
		total=$bytes
		old_IP=$next_IP
	else
		echo "$old_IP $total"
		total=$bytes
		old_IP=$next_IP
	fi
done < textfile

Thank you in advance.
# 2  
Old 08-12-2011
Tools Summing Values in column

Hi,

Code:
nawk 'BEGIN{FS=" ";}{if( a[$1] ){a[$1]=a[$1]+$2;}else{a[$1]=$2;}}END{for ( i in a ){print i" "a[i];}}'  your_input_file


Cheers,
RangaSmilie
# 3  
Old 08-12-2011
Alternate awk..
Code:
awk '{a[$1]+=$2} END{for(i in a) print i,a[i]}' inputfile

Similar threads are posted in this forum, you could probably search to find different types of solutions available.
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Summing up values of rows of numbers

data file contains failed=24 error=23 error=163 failed=36 error=903 i need to get a total count of each value above. i'm looking for the most efficient method to do this as the datafile i provided is just a sample. the actual data can be several hundred thousands of lines. so from... (3 Replies)
Discussion started by: SkySmart
3 Replies

2. Shell Programming and Scripting

Summing columns over group of lines

I have an input file that looks like: ID1 V1 ID2 V2 P1 P2 P3 P4 ..... n no. of columns 1 1 1 1 1.0000 1.0000 1.0000 1.0000 1 1 1 2 0.9999 0.8888 0.7777 0.6666 1 2 1 1 0.8888 0.7777 0.6666 0.5555 1 2 1 2 0.7777 0.6666 0.5555 0.4444 2 1 1 1 0.6666 0.5555 0.4444 0.3333 2 1 1 2 0.5555 0.4444... (4 Replies)
Discussion started by: sdp
4 Replies

3. Shell Programming and Scripting

Summing columns in line

I have a file with the following format AAAAA 1.34B 0.76B 0.00B 0.00B 0.00B 0.00B 0.00B 0.00B 0.00B 0.00B 0.00B 0.00B 0.00B 0.00B 0.90B 0.00B 0.00B 0.46B 0.00B 0.03B 0.00B ... (4 Replies)
Discussion started by: ncwxpanther
4 Replies

4. Homework & Coursework Questions

HELP with Unix scripts in summing columns in a file

1. The problem statement, all variables and given/known data: Hi guys, i'm a new guy here, and it's my first time creating a unix script. can you guys help me out here? i'd really appreciate it. :( Here's my problem: This is the file i'm using, it has 6 columns, the first three columns are... (12 Replies)
Discussion started by: ramneim
12 Replies

5. Homework & Coursework Questions

HELP with Unix scripts in summing columns in a file.

Use and complete the template provided. The entire template must be completed. If you don't, your post may be deleted! 1. The problem statement, all variables and given/known data: Hi guys, i'm a new guy here, and it's my first time creating a unix script. can you guys help me out here? i'd... (3 Replies)
Discussion started by: ramneim
3 Replies

6. Shell Programming and Scripting

reading a script and summing some values

I need help reading and summing some values in a file that looks like the following. This is an Oracle trace file. Oracle has as utility to do this,but it doesn't work properly unless my sql statement is done. I want to read the file and sum up some values to let me know how the query/job is... (0 Replies)
Discussion started by: guessingo
0 Replies

7. Shell Programming and Scripting

Awk: Summing values with group criteria

Hi Guys, I have a text file with ";" like separator F1;F2;F3;F4;F5 444;100041;IT;GLOB;1800000000 444;100041;TM;GLOB;1000000000 444;10300264;IT;GLOB;2000000000 444;10300264;IT;GLOB;2500000000 I have to sum the cullums F5 for same F2 and F3 collums The result must be: ... (7 Replies)
Discussion started by: gianluca2
7 Replies

8. Shell Programming and Scripting

summing up iostat values in AIX

Friends, I have to run iostat -d on my AIX machine and print the sum of the output in tps column per iteration. can any one pls guide me how to do this using awk. here is the sample output iostat -d 2 2 | awk '!/System/ && !/Disks/ && !/cd/ && !/^$/ {print $4}' 2.0 3.0 1.0 3.0... (1 Reply)
Discussion started by: achak01
1 Replies

9. Shell Programming and Scripting

summing values of a column

I have a file which contains data as below: ----------------------------------------------------------------------------------------------- GSPWeb Statistics for the period of last 20 days... (3 Replies)
Discussion started by: mohsin.quazi
3 Replies

10. Shell Programming and Scripting

Summing the columns of a file

Hi All, I have a file like - num.txt 12, 34, 65, line1 34, 65, 89, line2 43, 65, 77, line3 I want to do two things - 1. Add first three columns of each line and print the line with largest value. i.e. (12+34+65) for 1st line and so on. 2. Add middle column of each line i.e.... (3 Replies)
Discussion started by: asahlot
3 Replies
Login or Register to Ask a Question