title: how to create a plot with customized points in R?
body: <p>I know I can create a plot with line and dots using the type = "o" argument in the plot command. I would like some more control over this -- I want to be able to draw the "o" as <em>full</em> dots, with black border and fill-in color of my choice, of customized size and of a different color than the line. Same for the line, I want to make it thicker, and of my choice of color. How would I go on about doing that?</p>
  
  <p>What I found until now is just a plain</p>
  
  <pre><code> plot(y, type= "o")
  </code></pre>
  
  <p>which is too poor for my needs.</p>
  
  <p>I am not interested in using ggplot, but instead use the internal plot library of R.
  Any help appreciated.</p>