Standardization of microarray data for clustering.

Description

Standardisation of the expression values of every gene is performed, so that the average expression value for each gene is zero and the standard deviation is one.

Usage

1

Arguments

eset

object of the classe ExpressionSet.

Value

The function produces an object of the ExpressionSet class with standardised expression values.

Author(s)

Matthias E. Futschik (http://itb.biologie.hu-berlin.de/~futschik)

Examples

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if (interactive()){
data(yeast)
# Data pre-processing
yeastF <- filter.NA(yeast)
yeastF <- fill.NA(yeastF)
yeastF <- standardise(yeastF)

# Soft clustering and visualisation
cl <- mfuzz(yeastF,c=20,m=1.25)
mfuzz.plot(yeastF,cl=cl,mfrow=c(4,5))
}

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