exprs.MA {limma} | R Documentation

## Extract Log-Expression Matrix from MAList

### Description

Extract the matrix of log-expression values from an `MAList` object.

### Usage

    exprs.MA(MA)

### Arguments

`MA` | an `MAList` object.

### Details

Converts M and A-values to log-expression values. The output matrix will have two columns for each array, in the order green, red for each array.

This contrasts with `as.matrix.MAList` which extracts the M-values only, or `RG.MA` which converts to expression values in `RGList` form.

### Value

A numeric matrix with twice the columns of the input.

### Author(s)

Gordon Smyth

### See Also

02.Classes gives an overview of data classes used in LIMMA.

[Package limma version 2.18.3 Index]