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Searching hash for values that make part of a key

bossanova352
New User

Mar 14, 2013, 8:26 PM

Post #1 of 4 (136 views)

Searching hash for values that make part of a key	Can't Post

Hi all,

I'm trying to search through a hash for numbers that correspond to the last few numbers in each string in the keys. The keys look something like this (yes it's a fasta):

>ID_#_length_#_cov_#

I want to filter by the cov_#, and I've gotten so far as to separate these cov_#'s out and can filter them alone. However, I'd like to search through the keys in the hash for the cov_#'s and print out both the keys and values that are left over after filtering the cov_#'s. Here is what I have so far (%sequences is the hash that already has appropriate keys and values):

Code

foreach $header (%sequences){ 
        $header =~ /cov_([0-9]*\.[0-9]*)/; 
        $cov = $1 * 1.0; 
        if ($cov <= 50 && $cov >= 5){ 
                #print $cov, "\n"; 
        } 
}

Any help would be greatly appreciated!

Kenosis
User

Mar 14, 2013, 9:21 PM

Post #2 of 4 (130 views)

Re: [bossanova352] Searching hash for values that make part of a key [In reply to]	Can't Post

Perhaps the following will be helpful:

Code

use strict; 
use warnings; 
 
my $cov; 
 
for my $header ( keys %sequences ) { 
	if ( ($cov) = $header =~ /cov_([\d.]+)/ and $cov <= 50 and $cov >= 5 ) { 
		print "$header => $sequences{$header}\n"; 
	} 
}

(This post was edited by Kenosis on Mar 14, 2013, 9:22 PM)

bossanova352
New User

Mar 14, 2013, 9:38 PM

Post #3 of 4 (126 views)

Re: [Kenosis] Searching hash for values that make part of a key [In reply to]	Can't Post

That worked beautifully! Thanks a lot for the help!

Kenosis
User

Mar 14, 2013, 9:54 PM

Post #4 of 4 (124 views)

Re: [bossanova352] Searching hash for values that make part of a key [In reply to]	Can't Post

You're most welcome!

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