cut and paste from two tables

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# 1  
Old 08-06-2009
Question cut and paste from two tables


I want to be able to cut and paste columns from two tables in one command.

Presently I do the following:

cut -f 1,3-6,9 > table1.out
cut -f 7,6,1-3 > table2.out
paste table1.out -d '\t' table2.out > MergedTable.out

Is there a better way to do this?

# 2  
Old 08-07-2009

I don't know if this is better, but it could be done without the files:
#!/usr/bin/env bash

# @(#) s1	Demonstrate process substitution in bash.

set +o nounset
echo "Environment: LC_ALL = $LC_ALL, LANG = $LANG"
echo "(Versions displayed with local utility \"version\")"
version >/dev/null 2>&1 && version "=o" $(_eat $0 $1)
set -o nounset

echo "1 2 3 4 5" >table1
echo "a b c d e" >table2

echo " Results:"
paste <( cut -d" " -f1,3 table1) <( cut -d" " -f2,4 table2)

exit 0

% ./s1

Environment: LC_ALL = C, LANG = C
(Versions displayed with local utility "version")
OS, ker|rel, machine: Linux, 2.6.26-2-amd64, x86_64
Distribution        : Debian GNU/Linux 5.0 
GNU bash 3.2.39

1 3	b d

This is called process substitution. It is available in recent versions of bash, see the man page for details ... cheers, drl
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