title: Plot three graphs in one
body: <p>I have three empirical distribution functions and I would like to plot these into one graph for an overview. 
  The x label should say 'Bedienzeit (s) and I would like different colors and a legend. Unfortunately all I am trying, does not really work well.</p>
  
  <p>Could anyone of you tell me how to do this?</p>
  
  <p>Thanks a lot!!</p>
  
  <pre><code>Daten &lt;- read_excel("Input/Daten_ohne_Anton_Leonie.xlsx")
  G_40_TmK_Alle_VP &lt;- Daten$G_40_TmK
  G_40_BmK_Alle_VP &lt;- Daten$G_40_BmK
  G_40_WoK_Alle_VP &lt;- Daten$G_40_WoK
  
  #ECDF TmK
  G_40_TmK_Alle_VP_ECDF &lt;- ecdf(G_40_TmK_Alle_VP)
  
  #ECDF BmK
  G_40_BmK_Alle_VP_ECDF &lt;- ecdf(G_40_BmK_Alle_VP)
  
  #ECDF WoK
  G_40_WoK_Alle_VP_ECDF &lt;- ecdf(G_40_WoK_Alle_VP)
  </code></pre>