8840
New User
Oct 14, 2008, 3:42 PM
Post #1 of 2
(1661 views)
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use of unitialised value problem
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Dear Perl veterans,
I have had this problem with my perl code the past two months. The soubroutine is a part of a larger program and everytime I run it I receive the warning message that there is an uninitialised value in the marked lines. I have tried to debug this for several weeks, re-writing the code but the warning message is persistent. The entire program runs and returns most of the time a desired output (at least what I think is) but sometimes fails to return an output. Many thanks in advance for any help.
The two subroutines basically do the same thing with numbers and letters.
sub number_segmentor {
my @s = @_;
chomp @s;
my @array;
for (my $gen = 15; $gen > 11; $gen--) {
my $length = @s;
my $position = '0';
while ($position < $length) {
my $count = $position + $gen;
my $p = 0;
($p += $_) for $seq[$position..$count]; #Unitialised value detected at this position, doesn't specify which variable
unless($position + $gen > $length) {push (@array, $p);}
$position++;
}
}
return @array;
}
sub letter_segmentor {
my @seq = @_;
chomp @seq;
my $length = @seq;
my @array;
my $antigen;
my $peptide;
my $position = 0;
for (my $gen = 15; $gen > 11; $gen--) {
while ($position < $length) {
my $count = $position + $antigen;
my $p = $seq[$position...$count]; #Unitialised value detected at this position, doesn't specify which variable
if (length($p) == $gen) {push (@array, $p);}
$position++;
}
}
return @array;
}
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