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Top Forums Shell Programming and Scripting Selecting lines having same values for first two columns Post 302748833 by sathyaonnuix on Thursday 27th of December 2012 03:08:09 AM
Old 12-27-2012
PS: Look the below code as written by an awk noob Smilie

Code:
sort -k 1,2 file | awk '{print $1,$2}' | uniq -d > temp #Identifies the reduntant values and stores it in a temp file

while read i
do
row1=$(grep "$i" file | head -1) #Takes the first row from the redundant rows
row2=$(grep "$i" file | tail -1) #Takes the second row from the redundant rows

diff=$(grep "$i" file | awk '{gsub(/[a-zA-Z: ]+/," ")
m=split($3,a," ");
for (i=1;i<=m;i++)
if (NR==1) b[i]=a[i]; else print a[i] - b[i] }') #Finds the difference between the rows

if [ $diff -lt 0 ];
then
 echo "$row2 moved to new file"
 echo $row2 >> new_file #With the difference the least row is found and stored in another file
else
 echo "$row1 moved to new file"
 echo $row1 >> new_file
fi 
done < temp

---------- Post updated at 03:08 AM ---------- Previous update was at 03:06 AM ----------

By comparing the above two comments, [pamu and myself], you can see how powerful awk is...
This User Gave Thanks to sathyaonnuix For This Post:
 

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ZGREP(1)                                                      General Commands Manual                                                     ZGREP(1)

NAME
zgrep - search possibly compressed files for a regular expression SYNOPSIS
zgrep [ grep_options ] [ -e ] pattern filename... DESCRIPTION
Zgrep invokes grep on compressed or gzipped files. These grep options will cause zgrep to terminate with an error code: (-[drRzZ]|--di*|--exc*|--inc*|--rec*|--nu*). All other options specified are passed directly to grep. If no file is specified, then the standard input is decompressed if necessary and fed to grep. Otherwise the given files are uncompressed if necessary and fed to grep. If the GREP environment variable is set, zgrep uses it as the grep program to be invoked. EXIT CODE
2 - An option that is not supported was specified. AUTHOR
Charles Levert (charles@comm.polymtl.ca) SEE ALSO
grep(1), gzexe(1), gzip(1), zdiff(1), zforce(1), zmore(1), znew(1) ZGREP(1)
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