an>, <span class='kw'>replace</span> <span class='kw'>=</span> <span class='fl'>TRUE</span>)</div><div class='output co'>#&gt;      mpg cyl  disp  hp drat    wt  qsec vs am gear carb
#&gt;  1: 17.8   6 167.6 123 3.92 3.440 18.90  1  0    4    4
#&gt;  2: 27.3   4  79.0  66 4.08 1.935 18.90  1  1    4    1
#&gt;  3: 22.8   4 108.0  93 3.85 2.320 18.61  1  1    4    1
#&gt;  4: 21.0   6 160.0 110 3.90 2.875 17.02  0  1    4    4
#&gt;  5: 15.2   8 304.0 150 3.15 3.435 17.30  0  0    3    2
#&gt;  6: 19.