title: How to set a fixed/static size of circle marker on a scatter plot?
body: <p>I want to plot the location of some disks generated randomly on a scatter plot, and see whether the disks are 'connected' to each other. For this, I need to set the radius of each disk fixed/linked to the axis scale.<br>
  The <code>'s'</code> parameter in the <code>plt.scatter</code> function uses points, so the size is not fixed relative to the axis. If I dynamically zoom into the plot, the scatter marker size remains constant on the plot and does not scale up with the axis.<br>
  How do I set the radius so they have a definite value (relative to the axis)?</p>