R: Rescale genetic maps

rescalemap {qtl} | R Documentation

## 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.

### 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.)

### 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`.

### Author(s)

Karl W Broman, broman@wisc.edu

### See Also

`replace.map`, `est.map`

### Examples

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

[Package qtl version 1.46-2 Index]