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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LEARN ABOUT NETBSD
column
COLUMN(1) BSD General Commands Manual COLUMN(1)
NAME
column -- columnate lists
SYNOPSIS
column [-tx] [-c columns] [-s sep] [file ...]
DESCRIPTION
The column utility formats its input into multiple columns. Rows are filled before columns. Input is taken from file operands, or, by
default, from the standard input. Empty lines are ignored.
The options are as follows:
-c Output is formatted for a display columns wide.
-s Specify a set of characters to be used to delimit columns for the -t option.
-t Determine the number of columns the input contains and create a table. Columns are delimited with whitespace, by default, or with
the characters supplied using the -s option. Useful for pretty-printing displays.
-x Fill columns before filling rows.
column exits 0 on success, >0 if an error occurred.
ENVIRONMENT
COLUMNS The environment variable COLUMNS is used to determine the size of the screen if no other information is available.
EXAMPLES
(echo "PERM LINKS OWNER GROUP SIZE MONTH DAY HH:MM/YEAR NAME";
ls -l | sed 1d) | column -t
SEE ALSO
colrm(1), ls(1), paste(1), sort(1)
HISTORY
The column command appeared in 4.3BSD-Reno.
BSD
March 9, 2008 BSD