expressionByFeature {Starr} | R Documentation

## Getting expression value by feature from an ExpressionSet

### Description

This function gets the expression of a specified feature (e.g. orf, gene) from an ExpressionSet.

### Usage

    expressionByFeature(eSet, fkt, method="median")

### Arguments

`eSet` | An ExpressionSet, containing the normalized expression values
`fkt` | Function to convert the featureNames (e.g. affy IDs) of eSet to the required features (e.g. ORFs)
`method` | If one feature (e.g. ORF) has more than one feature (e.g. affy ID) on the chip, the mean/median over the intensities is taken

### Author(s)

Benedikt Zacher zacher@lmb.uni-muenchen.de

### See Also

`mget`

[Package Starr version 1.42.0 Index]