unitestFilter-methods: Unitest Filter

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

Description

This method initializes the Unitest Filter.
Applying an unitest such as the t.test to two groups returns the p-value for the test and the value of the t-statistic. The Unitest Filter allows to select only rows satisfying e.g. a certain p-value as cutoff.
The Unitest Filter flags all rows with: flag = (variable <= cutoff)

Usage

unitestFilter(object)
unitestFilter(object, value)<-

Arguments

object	object of class UniFilter.
value	character vector c(cutoff, variable).

Details

The method unitestFilter initializes the following parameters:

	cutoff:	the cutoff level for the filter.
	variable:	variable="pval" (default): p-value.
		variable="stat": univariate statistic.
		variable="padj": optional adjusted p-value.
		variable="pcha": optional p-value obtained by permutations.

Value

An initialized UniFilter object.

Author(s)

Christian Stratowa

Examples

unifltr <- UniFilter()
unitestFilter(unifltr) <- c(0.01,"pval")
str(unifltr)

xps documentation built on Nov. 8, 2020, 6 p.m.