Hi - getting extremely stuck and would love some insight! I have a file which contains sequential numbers (actually genomic co-ordinates, I'm an amateur bioinformatician!) and an associated score. I need to extract regions where the score dips below a certain level. The file looks something like this:
1 50
2 50
3 1
4 10
5 49
6 8
7 50
8 5
9 5
10 40
So in this example - the first number on each line is the co-ordinate, and the second is the score. I need all the regions scoring less than 50, so for the small example above, I would get something like:
3 6
8 10
Hope that makes sense - I'm basically looking for the first and last positions where the score is less than 50. So far I have slurped the file into an array like this:
foreach my $line (@lines) {
chomp $line;
my @columns = split(/\t/, $line);
my $score = $columns[1];
if ($score < 50) {
#something here...
}
}
But I'm stuck with the 'something here' - I need to keep track of the first time a score of less than 50 is seen, and the last time it is seen before it goes above 50, and capture the two corresponding $columns[0] numbers. Really hope I've explained this properly! TIA.
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