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Full Discussion: awk question about sum
Top Forums UNIX for Dummies Questions & Answers awk question about sum Post 302593352 by civilianwarfare on Thursday 26th of January 2012 02:51:09 PM
Old 01-26-2012
Power awk question about sum

Hi everyone, i need help with a simple task. I have a file withe the format:


"01/20/2012 23:10:13.979","49","49","48","19"
"01/20/2012 23:15:13.969","47","47","48","18"
"01/20/2012 23:20:13.975","47","47","45","17"
"01/20/2012 23:25:13.980","44","44","44","17"
"01/20/2012 23:30:13.970","43","43","47","14"
"01/20/2012 23:35:13.976","45","45","44","15"
"01/20/2012 23:40:13.966","45","45","43","14"
"01/20/2012 23:45:13.971","42","42","44","14"
"01/20/2012 23:50:13.977","44","44","44","13"
"01/20/2012 23:55:13.966","44","44","42","12"

I need the next result:

"01/20/2012 23:10:13.979","49","49","48","19","165"
"01/20/2012 23:15:13.969","47","47","48","18","159"
"01/20/2012 23:20:13.975","47","47","45","17","156"
"01/20/2012 23:25:13.980","44","44","44","17","149"
"01/20/2012 23:30:13.970","43","43","47","14","147"
"01/20/2012 23:35:13.976","45","45","44","15","149"
"01/20/2012 23:40:13.966","45","45","43","14","147"
"01/20/2012 23:45:13.971","42","42","44","14","140"
"01/20/2012 23:50:13.977","44","44","44","13","145"
"01/20/2012 23:55:13.966","44","44","42","12","142"

Im neewbie with awk, i try with:

awk '
BEGIN {FS=OFS=","}
{
sum=0; n=0
for(k=2;k<=NF;k++)
{sum+=$k; ++n}
print $0, sum
}'file.txt > newfile.txt

But its just add a 0 at the end. Smilie

I'm stuck with this for a couple of hours, any idea? THX A LOT!!
 

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sum(1)								   User Commands							    sum(1)

NAME
sum - print checksum and block count for a file SYNOPSIS
sum [-r] [file...] DESCRIPTION
The sum utility calculates and prints a 16-bit checksum for the named file and the number of 512-byte blocks in the file. It is typically used to look for bad spots, or to validate a file communicated over some transmission line. OPTIONS
The following options are supported: -r Use an alternate (machine-dependent) algorithm in computing the checksum. OPERANDS
The following operands are supported: file A path name of a file. If no files are named, the standard input is used. USAGE
See largefile(5) for the description of the behavior of sum when encountering files greater than or equal to 2 Gbyte ( 2**31 bytes). ENVIRONMENT VARIABLES
See environ(5) for descriptions of the following environment variables that affect the execution of sum: LC_CTYPE, LC_MESSAGES, and NLSPATH. EXIT STATUS
The following exit values are returned. 0 Successful completion. >0 An error occurred. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | |Availability |SUNWesu | |CSI |enabled | +-----------------------------+-----------------------------+ SEE ALSO
cksum(1), sum(1B), wc(1), attributes(5), environ(5), largefile(5) DIAGNOSTICS
"Read error" is indistinguishable from end of file on most devices; check the block count. NOTES
Portable applications should use cksum(1). sum and usr/ucb/sum (see sum(1B)) return different checksums. SunOS 5.10 7 Nov 1995 sum(1)
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