threestepPLM {affyPLM} | R Documentation

## Three Step expression measures returned as a PLMset

### Description

This function converts an `AffyBatch` into an `PLMset` using a three step expression measure.

### Usage

    threestepPLM(object,subset=NULL, normalize=TRUE,background=TRUE,background.method="RMA.2",normalize.method="quantile",summary.method="median.polish",background.param = list(),normalize.param=list(),output.param=list(), model.param=list())

### Arguments

`object` | an `AffyBatch`
`subset` | a vector with the names of probesets to be used. If NULL then all probesets are used.
`normalize` | logical value. If `TRUE` normalize data using quantile normalization
`background` | logical value. If `TRUE` background correct using RMA background correction
`background.method` | name of background method to use.
`normalize.method` | name of normalization method to use.
`summary.method` | name of summary method to use.
`background.param` | list of parameters for background correction methods
`normalize.param` | list of parameters for normalization methods
`output.param` | list of parameters for output methods
`model.param` | list of parameters for model methods

### Details

This function computes the expression measure using threestep methods. It returns a `PLMset`. The most important difference is that the PLMset allows you to access the residuals which the `threestep` function does not do.

### Value

An `PLMset`

### Author(s)

Ben Bolstad bolstad@stat.berkeley.edu

### References

Under preparation

### See Also

`expresso`, `rma`, `threestep`, `rmaPLM`, `fitPLM`

### Examples

    data(affybatch.example)

    # should be equivalent to rma()
    eset <- threestepPLM(affybatch.example)

[Package affyPLM version 1.2.5 Index]