Shift starting points in genetic maps
Shift starting points in a genetic map to a set of defined positions
shiftmap(object, offset=0)
object |
An object of class |
offset |
Defines the starting position for each chromosome. This should be a single value (to be used for all chromosomes) or a vector with length equal to the number of chromosomes, defining individual starting positions for each chromosome. For a sex-specific map (as in a 4-way cross), we use the same offset for both the male and female maps. |
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 shifted so that the
starting positions are as in offset.
Karl W Broman, broman@wisc.edu
data(hyper) shiftedhyper <- shiftmap(hyper, offset=0) par(mfrow=c(1,2)) plotMap(hyper, shift=FALSE, alternate.chrid=TRUE) plotMap(shiftedhyper, shift=FALSE, alternate.chrid=TRUE)
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