group.density | R Documentation |
Group peaks together across samples using overlapping m/z bins and calculation of smoothed peak distributions in chromatographic time.
object |
the |
minfrac |
minimum fraction of samples necessary in at least one of the sample groups for it to be a valid group |
minsamp |
minimum number of samples necessary in at least one of the sample groups for it to be a valid group |
bw |
bandwidth (standard deviation or half width at half maximum) of gaussian smoothing kernel to apply to the peak density chromatogram |
mzwid |
width of overlapping m/z slices to use for creating peak density chromatograms and grouping peaks across samples |
max |
maximum number of groups to identify in a single m/z slice |
sleep |
seconds to pause between plotting successive steps of the peak grouping algorithm. peaks are plotted as points showing relative intensity. identified groups are flanked by dotted vertical lines. |
An xcmsSet
object with peak group assignments and statistics.
group(object, bw = 30, minfrac = 0.5, minsamp = 1,
mzwid = 0.25, max = 50, sleep = 0)
do_groupChromPeaks_density
for the core API function
performing the analysis.
xcmsSet-class
,
density
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