Plot simple time axis for events
<p>I'm looking for a solution to plot a time axis where events are marked as red vertical lines. I didn't find anything like that:</p>

<p><a href="https://i.stack.imgur.com/yhPLq.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/yhPLq.png" alt="enter image description here"></a>
(the height of the red lines should be equal)</p>

<p>The data is just a list of unix timestamps which should be plotted as red strings between a timespan.</p>

<p>How to plot using ggplot?</p>