class="op">=</span><span class="fl">25</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    NA      NA  7.4   NA     5   1</span>
<span class="co">#&gt; 2    NA      NA  8.0   NA     5   2</span>
<span class="co">#&gt; 3    12      NA 12.6   NA     5   3</span>
<span class="co">#&gt; 4    18      NA 11.5   NA     5   4</span>
<span class="co">#&gt; 5    NA      NA 14.3   NA     5   5</span>
<span class="co">#&g