>


<dl><dt id="arg-unit">unit<a class="anchor" aria-label="anchor" href="#arg-unit"></a></dt>
<dd><p>a character value indicating the unit. These
are matched according to rules developed to work with actual
data files, and so the list is not by any means exhaustive.</p></dd>


<dt id="arg-scale">scale<a class="anchor" aria-label="anchor" href="#arg-scale"></a></dt>
<dd><p>a character value indicating the scale.  The default value
of <code>NULL</code> dictates that the scale is to be inferred from the unit.