08-24-2011
Extract columns from multiple files with a file name as heading
Hi All,
I have 7 files, each containing 9 columns separated by space. I want to extract the 9th columns from every file and save in a new file. The columns must be pasted next to each other. And the title of each columns should be the name of the corresponding files! Since the 3rd column is common to all files, I can extract it in a new file and join with the output.
Ex. file1
sl core name conc dilu fill rate type final
34 12 sn1 21 0.45 56 76 0.44 0.009
23 45 sn2 87 12 45 67 87 0.08
file2
sl core name conc dilu fill rate type final
45 67 sn1 45 78 34 19 56 0.09
34 62 sn2 12 78 89 43 16 0.006
output
name file1 file2
sn1 0.009 0.09
sn2 0.08 0.006
I greatly appreciate your help.
Thanks!
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COMM(1) BSD General Commands Manual COMM(1)
NAME
comm -- select or reject lines common to two files
SYNOPSIS
comm [-123f] 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.
-f Fold case in line comparisons.
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.
comm assumes that the files are lexically sorted; all characters participate in line comparisons.
EXIT STATUS
comm exits 0 on success, >0 if an error occurred.
SEE ALSO
cmp(1), diff(1), sort(1), uniq(1)
STANDARDS
The comm utility conforms to IEEE Std 1003.2-1992 (``POSIX.2'').
BSD
June 6, 1993 BSD