Difference between revisions of "Phred scale"
From Genome Analysis Wiki
Jump to navigationJump to search (Created page with 'A scale commonly used to measure data quality and error rates in sequence analysis. It was popularized by Phil Green's PHRED base-calling software. It is defined as: <math> …') |
(No difference)
|
Latest revision as of 16:17, 23 March 2010
A scale commonly used to measure data quality and error rates in sequence analysis. It was popularized by Phil Green's PHRED base-calling software.
It is defined as:
Thus, a base call that is expected to be correct 99% of the time (1% error rate), would be assigned a phredScore = 20. A base call expected to be accurate 99.9% of the time (0.1% error rate), would be assigned a phredScore = 30.
