R: Drop a QTL from a qtl object

dropfromqtl {qtl} | R Documentation

## Drop a QTL from a qtl object

### Description

Drop a QTL or multiple QTL from a QTL object

### Usage

    dropfromqtl(qtl, index, chr, pos, qtl.name, drop.lod.profile=TRUE)

### Arguments

`qtl` | A qtl object, as created by `makeqtl`.
`index` | Vector specifying the numeric indices of the QTL to be dropped.
`chr` | Vector indicating the chromosome for each QTL to drop.
`pos` | Vector (of same length as `chr`) indicating the positions of the QTL to be dropped.
`qtl.name` | Vector specifying the names of the QTL to be dropped.
`drop.lod.profile` | If TRUE, remove any LOD profiles from the object.

### Details

Provide either `chr` and `pos`, or one of `qtl.name` or `index`.

### Value

The input `qtl` object with the specified QTL omitted. See `makeqtl` for details on the format.

### Author(s)

Karl W Broman, `broman@wisc.edu`

### See Also

`makeqtl`, `fitqtl`, `addtoqtl`, `replaceqtl` , `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=0.001)
    qtl <- makeqtl(fake.f2, qc, qp, what="prob")

    newqtl <- dropfromqtl(qtl, chr=1, pos=25.8)
    altqtl <- dropfromqtl(qtl, index=1)

[Package qtl version 1.46-2 Index]