2 id="arguments">Arguments<a class="anchor" aria-label="anchor" href="#arguments"></a></h2>


<dl><dt id="arg-x">x<a class="anchor" aria-label="anchor" href="#arg-x"></a></dt>
<dd><p><code>numeric</code> data matrix</p></dd>


<dt id="arg-groups">groups<a class="anchor" aria-label="anchor" href="#arg-groups"></a></dt>
<dd><p><code>character</code> or <code>factor</code> vector of group labels,
either as a character vector, or a factor. See the parameter
<code>groupOrder</code> for ordering of group labels i