Type Alias QualityEncoding

Quality encoding systems used in FASTQ files

type QualityEncoding = {
    PHRED33: "phred33";
    PHRED64: "phred64";
    SOLEXA: "solexa";
}

Properties

PHRED33: "phred33"

ASCII 33-126, scores 0-93 (modern standard since Illumina 1.8+)

PHRED64: "phred64"

ASCII 64-126, scores 0-62 (legacy Illumina 1.3-1.7)

SOLEXA: "solexa"

Can have negative scores (-5 to 62), uses p/(1-p) probability