specDist.peakCount-methods: a Distance function based on matching peaks

In xcms: LC-MS and GC-MS Data Analysis

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, [e-mail]

xcms documentation built on Nov. 8, 2020, 5:13 p.m.