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Vertical sorting of columns

 
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Top Forums UNIX for Dummies Questions & Answers Vertical sorting of columns
# 8  
Old 08-07-2009
Hi.

Here is a perl solution on OS X:
Code:
#!/usr/bin/env bash

# @(#) s2	Demonstrate sort items on a line, perl

echo
set +o nounset
LC_ALL=C ; LANG=C ; export LC_ALL LANG
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) perl
set -o nounset
echo

FILE=${1-data1}

echo " Data file $FILE:"
cat $FILE

echo
echo " Results:"
perl -n -e 'print join(" ",sort({$a<=>$b} split)),"\n";' $FILE

exit 0

producing:
Code:
$ ./s2

Environment: LC_ALL = C, LANG = C
(Versions displayed with local utility "version")
OSX 10.3.9
GNU bash 2.05b.0
perl 5.8.1

 Data file data1:
a b d f c e
1 4 10 16 7 13
2 5 11 17 8 14
3 6 12 18 9 15

 Results:
a b d f c e
1 4 7 10 13 16
2 5 8 11 14 17
3 6 9 12 15 18

Note that this is a numeric sort, which seems to be the bulk of the problem. Adding an alpha sort for the first line to perl would make it too long for a convenient one-line command. You could strip and sort the first line separately if that's really important.

I also wrote a version with gawk, but my OS X does not have gawk. However, if yours does, here is the code:
Code:
#!/usr/bin/env bash

# @(#) s1	Demonstrate sort items on a line, GNU awk, "gawk"

echo
set +o nounset
LC_ALL=C ; LANG=C ; export LC_ALL LANG
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) awk
set -o nounset
echo

FILE=${1-data1}

echo " Data file $FILE:"
cat $FILE

echo
echo " Results:"
awk '
	{ split($0,a) ; n = asort(a)
	  for (i=1 ; i <= n ; i++ ) {
	    printf("%s%s", a[i],FS)
	  }
	print ""
	}
' $FILE

exit 0

on Debian GNU/Linux this produces:
Code:
% ./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
GNU Awk 3.1.5

 Data file data1:
a b d f c e
1 4 10 16 7 13
2 5 11 17 8 14
3 6 12 18 9 15

 Results:
a b c d e f 
1 4 7 10 13 16 
2 5 8 11 14 17 
3 6 9 12 15 18

The gawk intepreter is useful because it contains a sort builtin, asort, so that one need not fire off a separate process for each line.

Best wishes ... cheers, drl
 
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