SRV {mQTL.NMR} | R Documentation

## Statistical Recoupling of Variables

### Description

Base function for dimensionality reduction by statistical recoupling of variables

### Usage

    SRV(X, minsize, correl, clustf = median)

### Arguments

`X` | matrix of metabolomic data
`minsize` | a numerical value defining the singlet size
`correl` | a numerical value defining the bucketting resolution
`clustf` | a numerical value defining the correlation threshold

### Value

A list:

`indicesdebf` | a vector indicating the starting border of superclusters
`indicesfinf` | a vector indicating the ending border of superclusters
`Xcluster` | matrix of reduced data

### Author(s)

Jean-Baptiste Cazier

### References

Blaise,B. et al (2009) Statistical recoupling prior to significance testing in nuclear magnetic resonance based metabonomics, Anal. Chem., 81(15), 6242-6251.

### See Also

`pre_mQTL`

### Examples

    # Load data files

        load_datafiles()

        Sp<-read.table(phenofile, as.is=TRUE, header=TRUE, sep='\t')

    # Perform the SRV analysis to reduce the number of dimension of Spectra #data (Sp)

        corrT=0.9 # correlation threshold
        minsize=10 # singlet size
        met="rectangle" # summary measure

        SRV<-SRV(t(Sp), minsize, corrT,clustf=met)

[Package mQTL.NMR version 1.14.0 Index]