getVariance {beadarray}R Documentation

Gets the bead-type variances from an ExpressionSetIllumina Object

Description

Calculates the variance for each bead-type on each array from an ExpressionSetIllumina object.

Usage

getVariance(object, offset=0)

Arguments

object ExpressionSetIllumina object
offset numeric value to add to the variances to avoid very small values

Details

getVariance uses the se.exprs and NoBeads slots in assayData to calculate the variances for each bead-type on each array.

Value

A matrix containing the variances.

Author(s)

Matt Ritchie

Examples

data(BSData)
v = getVariance(BSData)
boxplot(as.data.frame(log2(v)), ylab="log2var", xlab=colnames(BSData), las=2)

[Package beadarray version 1.10.0 Index]