title: user defined minor tics in gnuplot
body: <p>Is there a simple way to set user defined minor tics in gnuplot, analogous to </p>
  
  <pre><code>set ytics add (gprintf("$%g$", -1.0e0) mytic(-1.0e0))
  </code></pre>
  
  <p>for major tics? mytic in this example is a user defined function which describes the scaling on the y-axis.</p>