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Full Discussion: [SOLVED] Handling multiple files using awk
Top Forums Shell Programming and Scripting [SOLVED] Handling multiple files using awk Post 302550815 by muazfarooqaslam on Saturday 27th of August 2011 07:58:33 PM
Old 08-27-2011
i tried following but its not working,

Code:
awk '{ arr[$1]=arr[$1]+$2} {  for (i in arr) print i,arr[i] } ' file1 file2

i was not sure how to deal with 3 columns, so i only tried working with 2 i.e. $1 and $2. I was trying to create an array with with $1 as index and $2 as value. But its not working Smilie

---------- Post updated at 02:39 AM ---------- Previous update was at 02:05 AM ----------

ok, i've got it to work with 2 columns. It matches column 1 from both files and add corresponding entry from column 2,

Code:
nawk ' BEGIN {
while ( getline <  "cluster2_data" > 0)
{
n[$1]=$2
}
}
{
n[$1]=n[$1]+$2
}
{
print $1,n[$1]
}' cluster1_data

but i am struggling with getting it to work with both columns 2 and 3. Please somebody help.

---------- Post updated at 02:50 AM ---------- Previous update was at 02:39 AM ----------

please somebody help...

---------- Post updated at 02:58 AM ---------- Previous update was at 02:50 AM ----------

done!!!!! Smilie

Code:
nawk ' BEGIN {
while ( getline <  "file1" > 0)
{
m[$1]=$2
n[$1]=$3
}
}
{
m[$1]=m[$1]+$2
n[$1]=n[$1]+$3
}
{
print $1,m[$1],n[$1]
}' file2

Last edited by radoulov; 08-28-2011 at 03:52 AM.. Reason: Code tags.
 

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LEARN ABOUT REDHAT

head

HEAD(1) 								FSF								   HEAD(1)

NAME

       head - output the first part of files

SYNOPSIS

       head [OPTION]... [FILE]...

DESCRIPTION

       Print  first  10 lines of each FILE to standard output.	With more than one FILE, precede each with a header giving the file name.  With no
       FILE, or when FILE is -, read standard input.

       Mandatory arguments to long options are mandatory for short options too.

       -c, --bytes=SIZE
	      print first SIZE bytes

       -n, --lines=NUMBER
	      print first NUMBER lines instead of first 10

       -q, --quiet, --silent
	      never print headers giving file names

       -v, --verbose
	      always print headers giving file names

       --help display this help and exit

       --version
	      output version information and exit

       SIZE may have a multiplier suffix: b for 512, k for 1K, m for 1 Meg.

AUTHOR

       Written by David MacKenzie.

REPORTING BUGS

       Report bugs to <bug-coreutils@gnu.org>.

COPYRIGHT

       Copyright (C) 2002 Free Software Foundation, Inc.
       This is free software; see the source for copying conditions.  There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICU-
       LAR PURPOSE.

SEE ALSO

       The  full documentation for head is maintained as a Texinfo manual.  If the info and head programs are properly installed at your site, the
       command

	      info head

       should give you access to the complete manual.

head (coreutils) 4.5.3						   February 2003							   HEAD(1)
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