filterPeaks: Filter peak lists
In alsace: ALS for the Automatic Chemical Exploration of mixtures

Description Usage Arguments Value Author(s) See Also Examples

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.

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

`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.

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

Ron Wehrens

getAllPeaks

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"])