qtl (version 1.38-4)

rescalemap: Rescale genetic maps

Description

Rescale a genetic map by multiplying all positions by a constant

Usage

rescalemap(object, scale=1e-6)

Arguments

object

An object of class cross (see read.cross for details) or map (see sim.map for details).

scale

Scale factor by which all positions will be multiplied.

Value

• If the input is a map object, a map object is returned; if the input is a cross object, a cross object is returned. In either case, the positions of markers are simply multiplied by scale.

Details

This function is included particularly for the case that map positions in a cross object were provided in basepairs and one wishes to quickly convert them to Mbp or some other approximation of cM distances. (In the mouse, 1 cM is approximation 2 Mbp, so one might use scale=5e-7 in this function.)

See Also

replace.map, est.map

Examples

data(hyper)
rescaled <- rescalemap(hyper, scale=2)
plotMap(hyper, rescaled)