Need help in column comparison & adding extra line to files
Hi,
I wanted to check whether the x,y,z coordinates of two files are equal or not. At times, when one file is converted to another suitable file extension , there are some chances that the data mismatch would happen during the conversion. In order to avoid the data misfit, i would like to compare the co-ordinates of the both files and check whether they are equal or not.
For example, following are the sample files :
File1 (here additional columns are intentional left, but in real file, there are around 10 columns)
awk '{print $2,$3,$4,$5}}' file1 > xyz
awk '{print $2,$3,$4,$5}}' file2 > data
paste xyz data > inn
awk '{print $0,$1-$6,$2-$7,$3-$8,$4-$5}' inn > core
awk '{print $9,$10,$11,$12}' core > comp
rm xyz data inn core
The above code gives the desired result as displayed in the expected output. But, is there any other way of using the shell commands more efficiently. !!!!
Last edited by b@l@ji; 11-22-2012 at 08:55 PM..
Reason: need to amend the code
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Discussion started by: Suresh
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LEARN ABOUT OPENDARWIN
comm
COMM(1) BSD General Commands Manual COMM(1)NAME
comm -- select or reject lines common to two files
SYNOPSIS
comm [-123i] file1 file2
DESCRIPTION
The comm utility reads file1 and file2, which should be sorted lexically, and produces three text columns as output: lines only in file1;
lines only in file2; and lines in both files.
The filename ``-'' means the standard input.
The following options are available:
-1 Suppress printing of column 1.
-2 Suppress printing of column 2.
-3 Suppress printing of column 3.
-i Case insensitive comparison of lines.
Each column will have a number of tab characters prepended to it equal to the number of lower numbered columns that are being printed. For
example, if column number two is being suppressed, lines printed in column number one will not have any tabs preceding them, and lines
printed in column number three will have one.
The comm utility assumes that the files are lexically sorted; all characters participate in line comparisons.
DIAGNOSTICS
The comm utility exits 0 on success, and >0 if an error occurs.
SEE ALSO cmp(1), diff(1), sort(1), uniq(1)STANDARDS
The comm utility conforms to IEEE Std 1003.2-1992 (``POSIX.2'').
HISTORY
A comm command appeared in Version 4 AT&T UNIX.
BSD June 6, 1993 BSD