xps (version 1.32.0)

fcFilter-methods: Fold-Change Filter

Description

This method initializes the Fold-Change Filter. The fold-change is determined by the mean value of group 2 divided by the mean value of group 1. The Fold-Change Filter flags all rows with: flag = (fc >= cutoff)

Usage

fcFilter(object) fcFilter(object, value)<-

Arguments

object

object of class UniFilter.

value

numeric vector c(cutoff, direction)

Value

An initialized UniFilter object.

Details

The method fcFilter initializes the following parameters:

	cutoff:
the cutoff level for the filter.
direction:	direction="both" (default): select up and downregulated genes.
direction="up": select upregulated genes only.

Examples

unifltr <- UniFilter()
fcFilter(unifltr) <- c(1.5,"both")
str(unifltr)