Learn R Programming

RaMS (version 1.4.3)

grabSpectraPremz: Extract the precursor mass from the spectra of an mzML nodeset

Description

Extract the precursor mass from the spectra of an mzML nodeset

Usage

grabSpectraPremz(xml_nodes)

Value

A numeric vector of precursor masses, one for each scan

Arguments

xml_nodes

An xml_nodeset object corresponding to the spectra collected by the mass spectrometer, usually produced by applying `xml_find_all` to an MS1 or MS2 nodeset.