Hi, I'd would appreciate some help with formatting a fasta file with perl. My input file looks like this: 
>dfbdbgf_356dfbdf
ATGGCTATCGATT
>sdgthhr_478364df
ATGGCTATCGATT

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I want to have an output file that looks like this: 
ATGGCTATCGATT  4
TGCATGCGCTACG   7

[download]
Basically, I want to:

-delete the header line and also delete reads that are NOT between 15-30 bp long

-Count the number of times that a read appears and put the value in column 2.

-Delete non-unique reads.

Thanks

In reply to How to format fasta file by andyBio

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