alsace (version 1.8.0)

filterPeaks: Filter peak lists

Description

Utility function to remove peaks from a peak list, e.g. because their intensity is too low. Currently one can filter on peak height, peak area, and width at half maximum.

Usage

filterPeaks(peakList, minHeight, minArea, minWHM, maxWHM)

Arguments

peakList

A nested list of peak tables: the first level is the sample, and the second level is the component. Every component is described by a matrix where every row is one peak, and the columns contain information on retention time, full width at half maximum (FWHM), peak width, height, and area.

minHeight

Minimum peak height.

minArea

Minimum peak area.

minWHM

Minimal width at half maximum.

maxWHM

Maximum width at half maximum.

Value

removed from the peak tables that are not satisfying the criteria.

See Also

getAllPeaks

Examples

data(teaMerged)
pks <- getAllPeaks(teaMerged$CList, span = 11)
## only retain peaks with a peak height of at least 2
pks.filtered <- filterPeaks(pks, minHeight = 2)
plot(teaMerged, mat.idx = 3, what = "profiles", comp.idx = 2,
     showWindows = FALSE, col = "blue")
abline(v = pks[[3]][[2]][,"rt"], col = "gray", lty = 2)
abline(v = pks.filtered[[3]][[2]][,"rt"])