title: ggplot : How to use column names as x-axis label and the values as y-axis
body: <p>Can't find a way to fix this!</p>
  <p>I want to plot a data frame which contains 4 columns it looks like this :</p>
  <div class="s-table-container">
  <table class="s-table">
  <thead>
  <tr>
  <th>Species</th>
  <th>Mean for today</th>
  <th>Mean RCP26</th>
  <th>Mean RCP85</th>
  </tr>
  </thead>
  <tbody>
  <tr>
  <td>1</td>
  <td>0.567</td>
  <td>0.765</td>
  <td>0.342</td>
  </tr>
  <tr>
  <td>2</td>
  <td>0.987</td>
  <td>0.543</td>
  <td>0.001</td>
  </tr>
  <tr>
  <td>3</td>
  <td>0.456</td>
  <td>0.876</td>
  <td>0.54</td>
  </tr>
  </tbody>
  </table>
  </div>
  <p>Now I want to plot the col names as the x-axis labels and the corresponding values above them. The species should have a color code in the legend. In the end I hope to get a line diagramm which shows the development from today to rcp85.</p>
  <p>I'm trying for hours now using ggplot but I cant find a way to realize it. Would be really glad to get some help.</p>