ratioFilter-methods

ratioFilter

ratioFilter<-

object

value

This method initializes the Ratio Filter.
 The ratio is the maximum value divided by minimum value for each row of the expression dataframe. 
 The Ratio Filter flags all rows with: <code>flag = (max/min >= cutoff)</code>Usage<code>ratioFilter(object)</code> 
<code>ratioFilter(object, value)&lt;-</code>

methods

The package handles pre-processing, normalization, filtering
and analysis of Affymetrix GeneChip expression arrays, including exon
arrays (Exon 1.0 ST: core, extended, full probesets), gene arrays (Gene 1.0 ST)
and plate arrays on computers with 1 GB RAM only. It imports Affymetrix
.CDF, .CLF, .PGF and .CEL as well as annotation files, and computes e.g. RMA,
MAS5, FARMS, DFW, FIRMA, tRMA, MAS5-calls, DABG-calls, I/NI-calls. It is an R wrapper to
XPS (eXpression Profiling System), which is based on ROOT, an object-oriented
framework developed at CERN. Thus, the prior installation of ROOT is a prerequisite
for the usage of this package, however, no knowledge of ROOT is required.
ROOT is licensed under LGPL and can be downloaded from http://root.cern.ch.

Christian Stratowa

Processing and Analysis of Affymetrix Oligonucleotide Arrays
including Exon Arrays, Whole Genome Arrays and Plate Arrays

ratioFilter-methods function

This method initializes the Ratio Filter.
 The ratio is the maximum value divided by minimum value for each row of the expression dataframe. 
 The Ratio Filter flags all rows with: <code>flag = (max/min >= cutoff)</code>

Usage

<code>ratioFilter(object)</code> 
<code>ratioFilter(object, value)<-</code>

ratioFilter-methods: Ratio Filter

Description

Arguments

Value

Details

Examples

	`cutoff`:
the cutoff level for the filter.