qtl (version 1.39-5)

nqtl: Determine the number of QTL in a QTL object

Description

Determine the number of QTL in a QTL object.

Usage

nqtl(qtl)

Arguments

qtl

An object of class qtl. See makeqtl for details.

Value

The number of QTL in the input QTL object.

See Also

makeqtl, fitqtl, dropfromqtl, replaceqtl, addtoqtl, summary.qtl, reorderqtl

Examples

data(fake.f2)

# take out several QTLs and make QTL object
qc <- c("1", "6", "13")
qp <- c(25.8, 33.6, 18.63)
fake.f2 <- subset(fake.f2, chr=qc)

fake.f2 <- calc.genoprob(fake.f2, step=2, err=0)
qtl <- makeqtl(fake.f2, qc, qp, what="prob")

nqtl(qtl)