I want to run SHRiMP on SOLiD data, but despite reading the manual I can't find a parameter that allows me to give the .qual file as input. Does SHRiMP not consider quality values at all?
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Originally posted by agc View PostI want to run SHRiMP on SOLiD data, but despite reading the manual I can't find a parameter that allows me to give the .qual file as input. Does SHRiMP not consider quality values at all?
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Phillip
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Originally posted by agc View PostA new version of SHRiMP was released just last month, so it can't be that outdated. And I think I saw somewhere that it does take quality values into consideration.
2.0.2: Sep 20, 2010
[...]
- Added --bfast option that performs global color space alignments
along with reporting color space base qualities
But this does not indicate that quality values are used in mapping, only that with the --bfast option that "color space base qualities" are reported.
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Phillip
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SHRiMP has been using mapping quality values since v2.2.0 in August 2011. If the reads are given in .fasta files, all colors use a default qv corresponding to 3% error rate (about 17). If they are given in fastq files, the qualities are interpreted according to the PHRED value and used as integral part of the alignment. It doesn't take .qual input directly. See such options as --pr-xover, --min-avg-qv, --qv-offset, --ignore-qvs in README.-- Matei David
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