annotateSpectrum: annotateSpectrum
In mjhelf/MassTools: R package for mass and molecular formula calculations

Match peaks in a spectrum with those in a labeling data.frame and prepare them for plotting functions. Matches have to be within abs OR ppm

1 2	annotateSpectrum(labels, spectrum, mzlabel = F, unmodifiedTag = "", ppm = 5, abs = 0)

`labels`	a data.frame as returned by permutatePeptideMass
`spectrum`	a mass spectrum as data.frame or matrix
`mzlabel`	if TRUE, will add mz values to the label
`unmodifiedTag`	what tag to use for unmodified fragment ions
`ppm`	relative matching tolerance in ppm
`abs`	matching tolerance in absolute numbers