filterPeaks: Filter peak lists

Description Usage Arguments Value Author(s) See Also Examples

View source: R/filterPeaks.R

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

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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

A peak list similar to the input peakList, but with all rows removed from the peak tables that are not satisfying the criteria.

Author(s)

Ron Wehrens

See Also

getAllPeaks

Examples

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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"])

alsace documentation built on Nov. 8, 2020, 5:54 p.m.