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#!/usr/bin/perl |
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use strict; |
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use Getopt::Std; |
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use FindBin;use lib $FindBin::Bin; |
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|
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my $usage = q/Usage: |
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dust.pl [-c <repeat#>] <fasta_file> |
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|
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Masks all repeats of unit length 1 or greater that are repeated at |
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least 4 times. |
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Options: |
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-c sets the repeat count to <repeat#> (default 4) |
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/; |
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umask 0002; |
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getopts('c:o:') || die($usage."\n"); |
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my $outfile=$Getopt::Std::opt_o; |
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my $c=$Getopt::Std::opt_c || 4; |
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|
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{ |
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local $/="\n>"; |
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while (<>) { |
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s/^>//; |
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chomp; |
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my ($header, $seq)=(m/^([^\n]+)\n(.+)/s); |
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$seq =~ tr/\t \n\r//d; |
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|
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$seq =~ s/((\w{2,}?)\2{$c,})/'N' x length $1/oeg; |
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# for poly-nucleotide |
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#$seq =~ s/((\w)\2{6,})/'N' x length $1/oeg; |
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$seq =~ s/((\w)\2{5,})/'N' x length $1/eg; |
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#print $seq."\n"; |
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print ">$header\n"; |
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print join("\n", unpack('(A70)*', $seq))."\n"; |
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} |
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} |
