.f_label

Internal utility function to map a variable or column name to a more
descriptive, human-readable label based on a lookup table.
The lookup table must contain two columns:<ul>
<li><code>name_pattern</code> – Regular expressions to match column names</li>
<li><code>name_substitute</code> – Human-readable label returned when pattern matches</li>
</ul>The function returns the first matching substitute label.
If no pattern matches, the input <code>colname</code> is returned unchanged.
This function is not exported and is intended for use inside the <code>ume</code>
package (e.g., for automatic axis labeling in plotting functions).

internal

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

.f_label function

<dl><dt>colname</dt>
<dd>Character string. Column name to be matched.</dd>
<dt>lookup</dt>
<dd>A <code>data.table</code> or <code>data.frame</code> with columns
<code>name_pattern</code> and <code>name_substitute</code>.</dd></dl>

Arguments

Internal utility function to map a variable or column name to a more
descriptive, human-readable label based on a lookup table.
The lookup table must contain two columns:<ul>
<li><code>name_pattern</code> – Regular expressions to match column names</li>
<li><code>name_substitute</code> – Human-readable label returned when pattern matches</li>
</ul>

The function returns the first matching substitute label.
If no pattern matches, the input <code>colname</code> is returned unchanged.
This function is not exported and is intended for use inside the <code>ume</code>
package (e.g., for automatic axis labeling in plotting functions).

Internal helper: pretty label lookup — .f_label

<dl>

<dt>colname</dt>
<dd>Character string. Column name to be matched.</dd>


<dt>lookup</dt>
<dd>A <code>data.table</code> or <code>data.frame</code> with columns
<code>name_pattern</code> and <code>name_substitute</code>.</dd>

</dl>

.f_label: Internal helper: pretty label lookup

Description

Usage

Value

Arguments

Details