title: ggplot2 one line per each row dataframe
body: <p>I have a CSV file that contains the following data:</p>
  
  <pre><code>user,Measurement1,Measurement2,Measurement3,group
  1,0.1,0.7,0.2,3
  2,0.3,0.3,0.4,2
  3,0.3,0.3,0.4,2
  </code></pre>
  
  <p>I need to plot one line per each user. The x axis can be just 1,2,3 (one point per each measurement labeled as before,at,after, but I can work out the labeling later). The color will be set by the group columns
  I found <a href="https://stackoverflow.com/questions/11751047/ggplot-to-create-multi-line-plot-from-csv-file">a plot</a> similar to the one I need but I don't want to use the user code as the x value.</p>