<code><a href="gf_facet_grid.html">gf_facet_wrap()</a></code> and
<code><a href="gf_facet_grid.html">gf_facet_grid()</a></code> that is terser and may feel more familiar to users
of <span class="pkg">lattice</span>.</p>
    </div>
    <div id="evaluation">
    <h2>Evaluation</h2>



<p>Evaluation of the <span class="pkg">ggplot2</span> code occurs in the environment of <code>gformula</code>.
This will typically do the right thing when formulas are created on the fly, but might not
be the right thing if form