Dear Monks, I have a number of motifs in a file which have start and end positions, corresponding to their positions in a string. 
e.g.where here 30 is the start position and 43 the end position

> genome.ptt_30 43
tggattgactgtg

> genome.ptt_107 128
ctgctgcatgtgatgactgtg

> genome.ptt_209 254
gcgccggactatgattgagctagcgtatgctgcatgctgatgtgt

[download]
However, I want to divide the motifs into groups based on their end positions according to a user defined value e.g of 100 (where every 100 characters a new group is formed and the motifs are divided into these groups). Please can someone help!? 
e.g desired output:

group 1 (1-100):
> genome.ptt_30 43
tggattgactgtg

group 2 (101-200):
> genome.ptt_107 128
ctgctgcatgtgatgactgtg

group 3 (201-300):
> genome.ptt_209 254
gcgccggactatgattgagctagcgtatgctgcatgctgatgtgt

[download]

In reply to Numerical problem! by Anonymous Monk

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