mzXML {xcms}R Documentation

High-performance, low-level access to mzXML data files

Description

Functions for low-level access to data in mzXML files. They have been optimized for maximum speed and memory efficiency.

Usage

mzXMLIsFile(filename)
mzXMLOpen(filename)
mzXMLClose(mxid)
mzXMLNumScans(mxid)
mzXMLRawData(mxid)

Arguments

filename path to mxXML file
mxid mzXML file ID

Details

The mechanisms and structure of mzXML files are not discussed here, please se the mzXML documentation for more information.

Value

mzXMLIsFile returns TRUE if the referenced file is an mzXML file and FALSE otherwise.
mzXMLOpen returns the mxid of the opened file.
mzXMLClose returns the closing status.
mzXMLNumScans returns the number of scans with an msLevel of 1.
mzXMLRawData returns a named list with components rt, tic, scanindex, mz, and intensity.
An error in any of the functions will return a (negative) integer error code.

Author(s)

Colin A. Smith, csmith@scripps.edu

References

mzXML file format: http://sashimi.sourceforge.net/software_glossolalia.html


[Package xcms version 1.2.0 Index]