n class='op'>+</span> <span class='va'>env</span>, data <span class='op'>=</span> <span class='va'>maize</span><span class='op'>)</span>
<span class='fu'><a href='https://rdrr.io/r/base/summary.html'>summary</a></span><span class='op'>(</span><span class='va'>M</span><span class='op'>)</span>
</div><div class='output co'>#&gt;           Df Pillai approx F num Df den Df    Pr(&gt;F)    
#&gt; family     4 2.2699   3.9361     16     48 0.0001151 ***
#&gt; env        3 1.6963   3.5782     12     33 0.00180