title: R ggplot facet_wrap output illegible
body: <p>I am having some trouble getting facet_wrap to output my charts in a legible fashion. I am not quite sure if there is a way to set each chart to fit the data so to speak.  My data frame is a set of weights taken at various times throughout the day, but each date might have a few results, or many.  </p>
  
  <p>head(df) results:</p>
  
  <pre><code>  Date Time   SKU Weight
  1 1/6/2016 9:37 10142  28.70
  2 1/6/2016 9:38 10142  27.45
  3 1/6/2016 9:38 10142  30.60
  4 1/6/2016 9:39 10142  30.60
  5 1/6/2016 9:39 10142  35.30
  6 1/6/2016 9:40 10142  28.25
  </code></pre>
  
  <p>The data continues for 6 months, I would like to represent each date in one line chart.  My approach has been ggplot and facet_wrap.  Perhaps this is not the approach I should take, so I am open to suggestions.</p>
  
  <pre><code>     p10142 &lt;- ggplot(wtData10142, aes(x = Time, y = Weight))
       (p10142 + geom_line() + facet_wrap(~ Date, ncol = 10))
  </code></pre>
  
  <p><img src="https://i.stack.imgur.com/w6lY6.png" alt="Jumbled Mess of Line Graphs"></p>
  
  <p>Any help would be greatly appreciated.</p>