affy (version 1.50.0)

assessSD: SD Assessment functions

Description

Assessment function for standard deviation estimates. Takes a dilution data ExpressionSet and returns a list with necessary information to create assessment plot.

Usage

assessSD(exprset, method.name=NULL, logx=FALSE)

Arguments

exprset

An ExpressionSet containing expression measures for Affymetrix's dilution experiment.

method.name

Name of expression measure being assessed.

logx

Logical indicating whether the average expression being computed should be logged, default no. See details.

Value

• Lists with the necessary information to make the Figures.

Details

assessSD does the assessment for Figure 7. This requires the ExpressionSet to have standard error estimates for the expression measure. Some expression measures (e.g. dChip) will have SEs in original scale, where others (e.g. RMA) will have them in log scale. For the former, use logx=TRUE.