Tools for calculating mass differences in mass spectrometry data to explore molecular adducts. To accompany Janda et al. (MS in prep.)
Import mass spectrometry imaging intensity data with msimat.
Tabulate mass differences from simple list of mass peaks with
massdiff.
Bin mass differences into histogram with hist.massdiff.
Get pairs of mass peaks corresponding to a specific mass difference with
diffGetPeaks.
Find the closest-matching mass differences for a set of known molecular
adducts with adductMatch; conversely, find the closest-
matching known molecular adducts for the most-abundant mass differences
with topAdducts.
Find significant correlations between specified pairs of mass peaks in
mass spectrometry imaging intensity data using corrPairsMSI.
Accompanying data: Lists of common molecular adducts with their
respective formulae and masses
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