'>9</span>, <span class='fl'>10</span>, <span class='fl'>13</span>)]
<span class='no'>month_df</span> <span class='kw'>&lt;-</span> <span class='fu'><a href='https://www.rdocumentation.org/packages/base/topics/data.frame'>data.frame</a></span>(<span class='kw'>month</span> <span class='kw'>=</span> <span class='no'>month</span>,
                       <span class='kw'>y</span> <span class='kw'>=</span> <span class='fu'><a href='https://www.rdocumentation.org/packages/stats/topics/Uniform'>runif</a></span>(<