pmppm

It shouldn't be hard to translate a point mass into a mass window bounded by
spectrometer accuracy.

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

pmppm function

<dl><dt>mass</dt>
<dd>A length-1 numeric representing the mass of
interest for which a mass range is desired.</dd>
<dt>ppm</dt>
<dd>The parts-per-million accuracy of the mass spectrometer on which
the data was collected.</dd></dl>

Arguments

Plus/minus parts per million — pmppm

<dl>

<dt>mass</dt>
<dd>A length-1 numeric representing the mass of
interest for which a mass range is desired.</dd>


<dt>ppm</dt>
<dd>The parts-per-million accuracy of the mass spectrometer on which
the data was collected.</dd>

</dl>

pmppm: Plus/minus parts per million

Description

Usage

Value

Arguments

Examples