title: How to combine and scatter plot with a parametric plot in gnuplot
body: <p>I am trying to plot some data with en ellipse on top in gnuplot. I want to plot the ellipse parametrically, and not using <code>set object ellipse</code>.</p>
  <p>The following code will plot the data:</p>
  <pre><code>plot &quot;my_file.dat&quot; u 1:2
  </code></pre>
  <p>The following code will plot the ellipse:</p>
  <pre><code>x0 = 1
  y0 = 2
  a = 3
  b = 2
  f(t) = x0 + a*cos(t)
  g(t) = y0 + b*sin(t)
  set parametric
  plot [0:2*pi] f(t),g(t)
  </code></pre>
  <p>How do I combine these plots in a single plot?</p>
  <p>I am running gnuplot 5.2.</p>