title: Visualizing stop over duration of marked individuals in R using ggplot
body: <p>I want to visualize the stopover duration and timing of several individually marked animals in a single plot. All individuals should be drawn on the y - axis, time on x - axis. I want every observation to be represented by a dot. To indicate the presence of an individual despite it was not observed on every day the minimum stopover interval (time from first to last observation) should be indicated by a solid or dashed line. Simplified my raw data look like this: </p>
  
  <pre><code>    date            individual
  1   10.02.15         Y1
  2   10.02.15         Y3
  3   11.02.15         Y1
  4   15.02.15         Y1
  </code></pre>
  
  <p>I transformed the date into day of year and tried to plot using ggplot but don´t manage to draw the dots or lines. </p>