plot.massdiffhist: Plot massdiffhist histogram with named adducts labeled

In kbseah/mass2adduct: Mass Spectrometry Imaging Molecular Adduct Finder

Description

Plot massdiff histogram with option of labeling peaks corresponding to known adducts or chemical transformations. The best-matching adducts for each histogram bin are found internally with adductMatch.histogram.

Usage

## S3 method for class 'massdiffhist'
plot(hist, add = mass2adduct::adducts,
  labels = NULL, pch = 0, col = "blue", cex = 0.5, pos = 4,
  main = "Mass difference histogram", xlab = "mass difference (m/z)",
  ...)

Arguments

hist	Histogram of a massdiff object produced by hist.massdiff
add	data.frame; adduct data to use to annotate the mass diff peaks, (default: built-in data set adducts)
labels	numeric; label histogram peaks with top N adducts from the adduct table specified to option add (default: NULL - no labels)
pch	Plot character to use for highlighting adduct peaks
col	Color for labels and text
cex	Character scaling for labelled points and text
pos	Position of text label, values 1, 2, 3, 4 are below, left, above, and to the right of points respectively.
main	character; Title for histogram plot
xlab	character; X-axis label
...	Other parameters to pass to plot

kbseah/mass2adduct documentation built on June 9, 2021, 9:20 p.m.