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# 1  
Old 04-07-2014
Independent column sorting

Dear All,
I have a set of columns (usually unknown number) and I would like to sort each of them (descending values) but my columns are independent. Can you please help me
file1
Code:
1,5,7
3,4,9
2,6,8

outcome should be
Code:
1,4,7
2,5,8
3,6,9

I have tried
Code:
sort -n -k1,1 -k2,2 -k3,3

but this assumes they are connected

thanks for your help in advance
A-V
# 2  
Old 04-07-2014
Try :

Code:
$ cat f
1,5,7
3,4,9
2,6,8

Code:
$ paste <(cut -d, -f1 f | sort) <(cut -d, -f2 f | sort) <(cut -d, -f3 f | sort) | tr -s '\t' ','
1,4,7
2,5,8
3,6,9

This User Gave Thanks to Akshay Hegde For This Post:
# 3  
Old 04-07-2014
I have tried but it does not work
I have a multiple files like this and I do not know the exact number of the columns so was thinking to be more adaptive
I have tried the following but then i only get the last file
Code:
FILES="data/*"
for X in $FILES
do
	name=$(basename $(basename $(basename $X)))
	cat $X |(cut -d, -f1 $X | sort) | (cut -d, -f2 $X | sort) | (cut -d, -f3 $X | sort)  >> test/${name}
done

# 4  
Old 04-07-2014
Try :

Code:
#!/bin/ksh

# Loop through files
for file in *.csv; do

# counting fields from first line and assuming fields in remaining lines are equal to first line
field=$(awk -F, 'NR==1{print NF;exit}' $file)

# Creating arguments here
for(( i=1; i<=$field; i++ )); do
  [ $i -eq 1 ] && arg="<(cut -d, -f$i $file | sort)" || arg="$arg  <(cut -d, -f$i $file | sort)"
done

# Final command to execute
final_cmd="paste $arg | tr -s '\t' ','"

# writing to new file
eval $final_cmd >"output_new_$file"

done

Code:
$ cat a.csv 
1,5,7
3,4,9
2,6,8

$ ksh tester

$ ls *.csv -1
a.csv
output_new_a.csv

$ cat output_new_a.csv 
1,4,7
2,5,8
3,6,9


Last edited by Akshay Hegde; 04-07-2014 at 12:54 PM..
This User Gave Thanks to Akshay Hegde For This Post:
# 5  
Old 04-07-2014
thank you very much ... it works well and thank you so much for explaining the code
its on ksh but i am sure it will still work well when i put the whole code together Smilie
# 6  
Old 04-07-2014
Hi A-V!

I forgot to use -d, with paste command you can remove tr -s '\t' ',', and replace

final_cmd="paste $arg | tr -s '\t' ','"

with

final_cmd="paste -d, $arg" to simplify code.
This User Gave Thanks to Akshay Hegde For This Post:
# 7  
Old 04-07-2014
If Perl is acceptable:
Code:
perl -F, -lane'
  push @d, [@F];
  END {
    $, = ",";
    for $i (0..$#F) {
      push @o, [sort { $a <=> $b } map $d[$_][$i], 0..$#d]
      }
    for $i (0..$#d) {
      print map $o[$_][$i], 0..$#F
      }
    }' infile


Last edited by radoulov; 04-07-2014 at 05:41 PM..
This User Gave Thanks to radoulov For This Post:
 
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