just a meditation about printing in descending order...

use strict;
use warnings;
 
my $ncol;
while (<DATA>){
  my ($id,@acgt)=split;
  my (%count,@reports);
 
  # -- count ACGT
  $count{$_}++ for (@acgt) ;
 
  # -- print in descending order
  while( my ($marker,$number) = each %count ) {
    push @reports, "$number $marker";
  }
  print "Column :",$ncol++,"\n";
  no warnings "numeric";
  print join ("\t",sort {$b <=>$a} @reports),"\n";
}
 
__DATA__
3851 A A G G T T A A C C
3854 A A G G T T A A C C
3871 A A G G T T A A G G

[download]

OUTPUT: 

Column :0
4 A    2 T    2 C    2 G
Column :1
4 A    2 T    2 C    2 G
Column :2
4 A    4 G    2 T

[download]

Cheers Rolf

In reply to Re: Count # of occurrences per column by LanX
in thread Count # of occurrences per column by Renyulb28

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.