specDist.peakCount-methods {xcms} | R Documentation

## a Distance function based on matching peaks

### Description

This method calculates the distance of two sets of peaks by just returning the number of matching peaks (m/z-values).

### Usage

    specDist.peakCount(peakTable1, peakTable2, mzabs=0.001, mzppm=10, symmetric=FALSE)

### Arguments

`peakTable1` | a Matrix containing at least m/z-values, row must be called "mz"
`peakTable2` | the matrix for the other mz-values
`mzabs` | maximum absolute deviation for two matching peaks
`mzppm` | relative deviations in ppm for two matching peaks
`symmetric` | use symmetric pairwise m/z-matches only, or each match

### Methods

peakTable1 = "matrix", peakTable2 = "matrix"

  `specDist.peakCount(peakTable1, peakTable2, mzppm=10,symmetric=FALSE )`

### Author(s)

Joachim Kutzera, jkutzer@ipb-halle.de

[Package xcms version 3.9.1 Index]