rescalemap {qtl} | R Documentation |
Rescale a genetic map by multiplying all positions by a constant
rescalemap(object, scale=1e-6)
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. |
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.)
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
.
Karl W Broman, kbroman@biostat.wisc.edu
data(hyper) rescaled <- rescalemap(hyper, scale=2) plot.map(hyper, rescaled)