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Top Forums UNIX for Dummies Questions & Answers Adding tags to a specific column of a space delimited text file Post 302598151 by evelibertine on Monday 13th of February 2012 02:18:18 PM
Old 02-13-2012
Adding tags to a specific column of a space delimited text file

I have a space delimited text file with two columns. I would like to add NA to the first column of the text file.

Input:
19625 10.4791768259
19700 10.8146489183
19701 10.9084026759
19702 10.9861346978
19703 10.9304364984

Output:
NA19625 10.4791768259
NA19700 10.8146489183
NA19701 10.9084026759
NA19702 10.9861346978
NA19703 10.9304364984

Thank you!
 

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COLUMN(1)							   User Commands							 COLUMN(1)

NAME
column - columnate lists SYNOPSIS
column [options] file... DESCRIPTION
The column utility formats its input into multiple columns. Rows are filled before columns. Input is taken from file or, by default, from standard input. Empty lines are ignored. OPTIONS
-c, --columns width Output is formatted to a width specified as number of characters. -t, --table 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 separator. Table output is useful for pretty-printing. -s, --separator separators Specify possible table delimiters (default is whitespace). -o, --output-separator separators Specify table output delimiter (default is two whitespaces). -x, --fillrows Fill columns before filling rows. -h, --help Print help and exit. ENVIRONMENT
The environment variable COLUMNS is used to determine the size of the screen if no other information is available. EXAMPLES
sed 's/#.*//' /etc/fstab | column -t BUGS
The util-linux version 2.23 changed -s option to be non-greedy, for example: $ printf "a:b:c 1::3 " | column -t -s ':' old output: a b c 1 3 new output (since util-linux 2.23) a b c 1 3 SEE ALSO
colrm(1), ls(1), paste(1), sort(1) HISTORY
The column command appeared in 4.3BSD-Reno. AVAILABILITY
The column command is part of the util-linux package and is available from ftp://ftp.kernel.org/pub/linux/utils/util-linux/. util-linux October 2010 COLUMN(1)
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