standardize.genes {supclust}R Documentation

Standardization of Predictor Variables

Description

Standardizes each column (gene) of the x-matrix to zero mean and unit variance. This function is not to be called by the user, the standardization is handled internally in pelora.

Usage

standardize.genes(exmat)

Arguments

exmat Numeric matrix of explanatory variables (p variables in columns, n cases in rows). For example, these can be microarray gene expression data which should be standardized and then grouped.

Value

Returns a list containing:

x The standardized x-matrix
means Numeric vector of length p, containing the initial mean of each column (gene) of the x-matrix.
sdevs Numeric vector of length p, containing the initial standard deviation of each column (gene) of the x-matrix.

Author(s)

Marcel Dettling, dettling@stat.math.ethz.ch

References

Marcel Dettling (2003) Finding Groups of Predictive Genes from Microarray Data, see http://stat.ethz.ch/~dettling/supervised.html

Marcel Dettling and Peter Bühlmann (2004). Finding Predictive Gene Groups from Microarray Data. To appear in the Journal of Multivariate Analysis.

See Also

pelora


[Package supclust version 1.0-5 Index]