makeContrasts {limma} | R Documentation |

## Construct Matrix of Custom Contrasts

### Description

Construct the contrasts matrix corresponding to specified contrasts of a set of given parameters.

### Usage

makeContrasts(..., levels)

### Arguments

`...` |
expressions, or character strings which can be parsed to expressions, specifying contrasts |

`levels` |
character vector giving the names of the parameters to be contrasts, or a factor or design matrix from which the names can be extracted. |

### Value

Matrix which columns corresponding to contrasts.

### Author(s)

Gordon Smyth

### See Also

An overview of linear model functions in limma is given by 06.LinearModels.

### Examples

makeContrasts(B-A,C-B,C-A,levels=c("A","B","C"))
makeContrasts("A","B","B-A",levels=c("A","B"))

[Package

*limma* version 2.4.7

Index]