Convert row to column


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# 1  
Convert row to column

Hi,
I have a file like this
Code:
50      1       2       1374438
50      1       2       1682957
50      5       2       1453574
50      10     2       1985890
100      1       2       737307
100      5       2       1660204
100      10       2       2148483

and I want to convert this by gathering all 4th Col values to column vise with combination of Col1andCol2
Code:
50/1        50/5                    50/10                100/1       100/5               100/10 
1374438  1453574   1985890 737307  1660204            2148483
1682957

The columns are separated by tab (Not in examples). I have 63 combinations of Col1/Col2 (50/1, 50/5 .... ) so hard coding is not a solution. Col3 is not in use so can ignore

Thanks in advance

Moderator's Comments:
Mod Comment Please use code tags, thanks. code and quote tags are different. quote tags are for quoting what other people wrote, code tags is for code, data or logs etc.

Last edited by zaxxon; 10-20-2011 at 10:17 AM..
# 2  
The following script (called like ~/$ perl test.pl tmp.dat) returns the result you require.
Code:
#!/usr/bin/perl

use strict;
use warnings;

my %table;
while(<>){
   my ($index_1,$index_2,$waste,$value)=split(/\s+/,$_);
   push @{$table{"$index_1/$index_2"}},$value;
}
my $rows=0;
$rows = $rows> $#{$table{$_}} ? $rows : $#{$table{$_}} for (keys %table);
print join( "",map {sprintf "%-11s", $_;} sort numeric_sort_col_header keys %table),"\n";
for my $index (0..$rows){
   for my $key (sort numeric_sort_col_header keys %table){
      printf "%-11s",($table{$key}->[$index]||"");
   }
   print "\n";
}
sub numeric_sort_col_header{
   my @A=split(/\//,$a);
   my @B=split(/\//,$b);
   $A[0]<=>$B[0]||$A[1]<=>$B[1]
}


Last edited by Skrynesaver; 10-20-2011 at 01:59 PM.. Reason: Make column headings line up
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