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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