dispersion,RepeatedRanking {GeneSelector} | R Documentation

## Compute genewise dispersion measures for repeated rankings

### Description

Dispersion is computed with respect to ranks, computed genewise. Three different measures are implemented: standard deviation (`sd`), median absolute deviation (`mad`), and interquartile range (`IQR`). The function is primarily intended to serve as helper function for AggregatePenalty.

### Usage

    dispersion(RR, measure = c("sd", "mad", "iqr"), scheme = c("original", "symmetric", "user"), center = NULL)

### Arguments

`RR` | An object of class `RepeatedRanking`.
`measure` | Specifies the dispersion measure, s. description.
`scheme` | Specifies how the location parameter is computed. If `scheme="original"`, then the location parameter is chosen as the reference ranking (slot `original`). If `scheme = "symmetric"`, then `original@ranking` and `rankings` are pooled to compute the location parameter either as the joint mean (if `measure` = "mean") or the joint median (if `measure = "median"`). Alternatively, the user may provide locations by using the `center` argument.
`center` | Location parameters to be used. Used only if `scheme` = "user".

### Value

A numeric vector containing the dispersion measure for each gene.

### Author(s)

Martin Slawski
Anne-Laure Boulesteix

### See Also

GeneRanking, RepeatedRanking

[Package GeneSelector version 2.30.0 Index]