download_library

Downloads one of the UME formula libraries from Zenodo only when explicitly
called by the user.
Unlike earlier versions, this CRAN-compliant implementation:<ul>
<li>never writes to the user's filespace unless <code>dest</code> is explicitly provided</li>
<li>does NOT create ~/.ume/ or any other default directory</li>
<li>does NOT perform automatic caching</li>
<li>In non-interactive environments (CRAN checks), the function returns NULL</li>
</ul>

Provides tools for assigning molecular formulas from exact masses
obtained by ultrahigh-resolution mass spectrometry. The methodology follows
the workflow described in Leefmann et al. (2019) <doi:10.1002/rcm.8315>.
The package supports the inspection, filtering and visualization of
molecular formula data and includes utilities for calculating common
molecular parameters (e.g., double bond equivalents, DBE). A graphical
user interface is available via the 'shiny'-based 'ume' application.

Boris Koch

Ultrahigh-Resolution Mass Spectrometry Data Evaluation for
Complex Organic Matter

download_library function

<dl><dt>library</dt>
<dd>Character. One of <code>"lib_02.rds"</code> or <code>"lib_05.rds"</code>.</dd>
<dt>doi</dt>
<dd>Character. Zenodo DOI.</dd>
<dt>dest</dt>
<dd>Optional file path where the library should be saved.
If <code>NULL</code>, the library is loaded into memory only.</dd>
<dt>overwrite</dt>
<dd>Logical. Redownload even if <code>dest</code> exists?</dd></dl>

Arguments

Download and Load a UME Formula Library from Zenodo — download_library

<dl>

<dt>library</dt>
<dd>Character. One of <code>"lib_02.rds"</code> or <code>"lib_05.rds"</code>.</dd>


<dt>doi</dt>
<dd>Character. Zenodo DOI.</dd>


<dt>dest</dt>
<dd>Optional file path where the library should be saved.
If <code>NULL</code>, the library is loaded into memory only.</dd>


<dt>overwrite</dt>
<dd>Logical. Redownload even if <code>dest</code> exists?</dd>

</dl>

download_library: Download and Load a UME Formula Library from Zenodo

Description

Usage

Value

Arguments