bg.adjust {affy} | R Documentation

## Background adjustment (internal function)

### Description

An internal function to be used by `bg.correct.rma`.

### Usage

    bg.adjust(pm, n.pts = 2^14, ...)
    bg.parameters(pm, n.pts = 2^14)

### Arguments

`pm` | a pm matrix
`n.pts` | number of points to use in call to `density`.
`...` | extra arguments to pass to bg.adjust.

### Details

Assumes PMs are a convolution of normal and exponential. So we observe X+Y where X is background and Y is signal. `bg.adjust` returns E[Y|X+Y, Y>0] as our background corrected PM. `bg.parameters` provides ad hoc estimates of the parameters of the normal and exponential distributions.

### Value

a matrix

### See Also

`bg.correct.rma`

[Package affy version 1.72.0 Index]