 1</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> Y.11    0    0    1    1</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> attr(,"map")</span>
<span class="r-out co"><span class="r-pr">#&gt;</span>      X0Y0 X1Y0 X0Y1 X1Y1</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> X0Y0    1    0    0    0</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> X1Y0    0    1    0    0</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> X0Y1    0    0    1    0