title: How to make a timeseries boxplot in R
body: <p>I'm trying to make a time series boxplot using <code>ggplot2</code>.</p>
  
  <p>I have montly values for many individuals.</p>
  
  <p>I need to make a timeseries boxplot by month with my data.</p>
  
  <p>I think that my problem is how to create a factor (month) with my data.</p>
  
  <pre><code>p &lt;- ggplot(mydata, aes(factor(date), measure))
  </code></pre>
  
  <p><img src="https://i.stack.imgur.com/mcmtL.png" alt="enter image description here"></p>