des of values passed must match
those required in GRASS, so a single GRASS string must be a character vector
of length 1, a single GRASS integer must be an integer vector of length 1
(may be an integer constant such as 10L), and a single GRASS float must be
a numeric vector of length 1. For multiple values, use vectors of suitable
length.</p></dd>


<dt id="arg-parameters">parameters<a class="anchor" aria-label="anchor" href="#arg-parameters"></a></dt>
<dd><p>list of GRASS command parameters, used if GRASS 