standardize.genes: Standardization of Predictor Variables

Description Usage Arguments Value Author(s) References See Also

View source: R/pelora-utils.R

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

1

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, [email protected]

References

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

Marcel Dettling and Peter B<c3><bc>hlmann (2004). Finding Predictive Gene Groups from Microarray Data. To appear in the Journal of Multivariate Analysis.

See Also

pelora


supclust documentation built on May 29, 2017, 9:19 a.m.