title: How to plot tree/graph/web data on gnuplot?
body: <p>I have a data-set that consist of edges and colors, and I want to plot them on a web-like manner, with lines and circles such as the picture below, and possibly with cluster coloring.</p>
  
  <p><img src="https://i.stack.imgur.com/lAIBi.png" alt="Graph example"></p>
  
  <p>The data is organized like this:</p>
  
  <pre><code>point1a_x point1a_y color
  point1b_x point1b_y color
  
  point2a_x point2a_y color
  point2b_x point2b_y color
  (...)
  
  point2n_x point2n_y color
  point2n_x point2n_y color
  </code></pre>
  
  <p>How would I go about doing it on gnuplot?</p>