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Full Discussion: Sed or awk script to remove text / or perform calculations from large CSV files
Top Forums Shell Programming and Scripting Sed or awk script to remove text / or perform calculations from large CSV files Post 302326305 by metronomadic on Wednesday 17th of June 2009 03:21:19 PM
Old 06-17-2009
Quote:
Originally Posted by ahmad.diab
To remove the second 12:21:10 use the below sed:

Code:
sed 's/.*:\([^,*]*\) AM/\1/g' file.txt

to get the to total use:-


Code:
awk ' BEGIN{c=0} {a[$1]+=$2;b[$1]+=$3;c++} END{for (i in a) {print "Total", a[i]/c,b[i]/c} ' file.txt

BR

Thanks Ahmad. I tried the awk code (which I think needs an extra } to close out the for loop?), but I think that might be calculating something else. I am trying to get the average flow (column three) for each minute (or each 15 minute span) of each day. I am not sure I understand the code, but from the output it looks like it is gathering each days worth of records, and dividing them by the number of days?

I don't mean to be a bother, but can you tell me if this is what is going on?
 

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LEARN ABOUT DEBIAN

seqdiag

SEQDIAG(1)						      General Commands Manual							SEQDIAG(1)

NAME

       seqdiag - generate sequence-diagram image file from spec-text file.

SYNOPSIS

       seqdiag [options] file

DESCRIPTION

       This manual page documents briefly the seqdiag commands.

       seqdiag is generate sequence-diagram image file from spec-text file.

OPTIONS

       These  programs	follow	the  usual  GNU  command  line	syntax, with long options starting with two dashes (`-').  A summary of options is
       included below.	For a complete description, see the Info files.

       --version
	      show program's version number and exit

       -h, --help
	      show this help message and exit

       -a, --antialias
	      Pass diagram image to anti-alias filter

       -c FILE, --config=FILE
	      read configurations from FILE

       -o FILE
	      write diagram to FILE

       -f FONT, --font=FONT
	      use FONT to draw diagram

       -T TYPE
	      Output diagram as TYPE format

SEE ALSO


       The programs are documented fully by
       http://tk0miya.bitbucket.org/seqdiag/build/html/index.html

AUTHOR

       seqdiag was written by Takeshi Komiya <i.tkomiya@gmail.com>

       This manual page was written by Kouhei Maeda <mkouhei@palmtb.net>, for the Debian project (and may be used by others).

								   May 21, 2011 							SEQDIAG(1)
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