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Top Forums Shell Programming and Scripting Loop through multiple rows using awk Post 302582103 by ida1215 on Thursday 15th of December 2011 01:44:45 AM
Old 12-15-2011
Loop through multiple rows using awk

Hi, i'm been browsing through the threads on how to do looping of multiple lines in awk but havent found the one i needed. I have a data which looks like this below. I need to compute for the monthly average of values per record and i used the awk argument below. how do i tell awk to execute the averaging on rows with similar record number?

Code:
awk 'NR > 1{next} { cnt[$3]++; tot1[$3]+=$5; tot2[$3]+=$6; tot3[$3]+=$7}END \
{ for (j in tot1) { print j, tot1[j]/cnt[j], tot2[j]/cnt[j], tot3[j]/cnt[j]}}'

Code:
record month value
1          1         2.3  
1          1         1.5
1          2         4.0
1          2         1.5
2          1         2.0
2          1         1.6

Thanks in advance.

Moderator's Comments:
Mod Comment How to use code tags

Last edited by Franklin52; 12-15-2011 at 03:25 AM.. Reason: Please use code tags for code and data samples, thank you
 

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IGAWK(1)							 Utility Commands							  IGAWK(1)

NAME
igawk - gawk with include files SYNOPSIS
igawk [ all gawk options ] -f program-file [ -- ] file ... igawk [ all gawk options ] [ -- ] program-text file ... DESCRIPTION
Igawk is a simple shell script that adds the ability to have ``include files'' to gawk(1). AWK programs for igawk are the same as for gawk, except that, in addition, you may have lines like @include getopt.awk in your program to include the file getopt.awk from either the current directory or one of the other directories in the search path. OPTIONS
See gawk(1) for a full description of the AWK language and the options that gawk supports. EXAMPLES
cat << EOF > test.awk @include getopt.awk BEGIN { while (getopt(ARGC, ARGV, "am:q") != -1) ... } EOF igawk -f test.awk SEE ALSO
gawk(1) Effective AWK Programming, Edition 1.0, published by the Free Software Foundation, 1995. AUTHOR
Arnold Robbins (arnold@skeeve.com). Free Software Foundation Nov 3 1999 IGAWK(1)
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