/span><span class='op'>)</span></span>
<span class='r-in'><span class='va'>data1</span> <span class='op'>&lt;-</span> <span class='fu'><a href='https://rdrr.io/r/base/data.frame.html'>data.frame</a></span><span class='op'>(</span></span>
<span class='r-in'>  x <span class='op'>=</span> <span class='va'>LETTERS</span><span class='op'>[</span><span class='fl'>1</span><span class='op'>:</span><span class='fl'>7</span><span class='op'>]</span>,</span>
<span class='r-in'>  shape <span class='op'>=</span> <span c