grabSpectraMz

The mz and intensity information of mzML files are encoded as binary arrays,
sometimes compressed via gzip or zlib or numpress. This code finds all the
m/z binary arrays and converts them back to the original measurements. See
https://github.com/ProteoWizard/pwiz/issues/1301

R-based access to mass-spectrometry (MS) data. While many packages
exist to process MS data, many of these make it difficult to
access the underlying mass-to-charge ratio (m/z), intensity, and
retention time of the files
themselves. This package is designed to format MS data in a tidy fashion and
allows the user perform the plotting and analysis.

William Kumler

RaMS

R Access to Mass-Spec Data

Ricardo Cunha

Ethan Bass

grabSpectraMz function

<dl><dt>xml_nodes</dt>
<dd>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.</dd>
<dt>file_metadata</dt>
<dd>Information about the file used to decode the binary
arrays containing m/z and intensity information. Here, the compression and
mz precision information is relevant.</dd></dl>

Arguments

Extract the mass-to-charge data from the spectra of an mzML nodeset — grabSpectraMz

<dl>

<dt>xml_nodes</dt>
<dd>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.</dd>


<dt>file_metadata</dt>
<dd>Information about the file used to decode the binary
arrays containing m/z and intensity information. Here, the compression and
mz precision information is relevant.</dd>

</dl>

grabSpectraMz: Extract the mass-to-charge data from the spectra of an mzML nodeset

Description

Usage

Value

Arguments