xps (version 1.32.0)

varFilter-methods: Variance Filter

Description

This method initializes the Variance Filter. The Variance Filter flags all rows with: flag = (var/mean >= cutoff)

Usage

varFilter(object) varFilter(object, value)<-

Arguments

object

object of class PreFilter.

value

numeric vector c(cutoff, trim, epsilon).

Value

An initialized PreFilter object.

Details

The method varFilter initializes the following parameters:

	cutoff:
the cutoff level for the filter.
trim:	the trim value for trimmed mean (default is trim=0).
	epsilon:
value to replace mean (default is epsilon=0.01):
	epsilon > 0: replace mean=0 with epsilon.

Note, that for epsilon = 0 the filter flags all rows with: variance >= cutoff

Examples

prefltr <- PreFilter()
varFilter(prefltr) <- c(0.6,0.02,0.01)
str(prefltr)