n><span class="op">)</span><span class="op">)</span><span class="op">)</span>
<span class="co">#&gt;      Ozone  Solar.R Wind Temp Month Day</span>
<span class="co">#&gt; 1 41.00000 190.0000  7.4   67     5   1</span>
<span class="co">#&gt; 2 36.00000 118.0000  8.0   72     5   2</span>
<span class="co">#&gt; 3 12.00000 149.0000 12.6   74     5   3</span>
<span class="co">#&gt; 4 18.00000 313.0000 11.5   62     5   4</span>
<span class="co">#&gt; 5 42.12931 185.9315 14.3   56     5   5</span>
<span class="c