groupCorr-methods {CAMERA} | R Documentation

## EIC correlation grouping of LC/ESI-MS data

### Description

Grouping the peaks after the correlation of the EICs into pseudospectragroups for a xsAnnotate object. Return a xsAnnotate object with group information.

### Usage

     groupCorr(object,cor_eic_th=0.75)

### Arguments

`object` | the `xsAnnotate` object
`cor_eic_th` | correlation threshold for the EIC correlation

### Details

The algorithm correlates the EIC of a every peak with all others, to find the peaks that belong to one substance. LC/MS data should grouped with groupFWHM first. This step reduce the runtime a lot and increased the number of correct classifications.

### Author(s)

Carsten Kuhl <ckuhl@ipb-halle.de>

### Examples

     library(CAMERA)
     file <- system.file('mzdata/MM14.mzdata', package = "CAMERA")
     xs   <- xcmsSet(c(file), method="centWave", ppm=30, peakwidth=c(5,10))
     an   <- xsAnnotate(xs)
     an   <- groupFWHM(an)
     an   <- groupCorr(an)

[Package CAMERA version 1.0.0 Index]