title: plotting matrices with gnuplot
body: <p>I am trying to plot a matrix in Gnuplot as I would using imshow in Matplotlib. That means I just want to plot the actual matrix values, not the interpolation between values. I have been able to do this by trying</p>
  
  <pre><code>splot "file.dat" u 1:2:3 ps 5 pt 5 palette
  </code></pre>
  
  <p>This way we are telling the program to use columns 1,2 and 3 in the file, use squares of size 5 and space the points with very narrow gaps. However the points in my dataset are not evenly spaced and hence I get discontinuities.</p>
  
  <p>Anyone a method of plotting matrix values in gnuplot regardless of not evenly spaced in Xa and y axes?</p>