title: gnuplot: superimposing contour plot and data on x-y plane
body: <p>I am new to gnuplot. I am trying to superimpose both a contour plot and some data points on the x-y plane.</p>
  
  <p>Data for my contour is given (<code>surface1.txt</code>) <a href="http://pastebin.com/AAvhq9vR" rel="nofollow noreferrer">here</a><br>
  Data for the single points is given (<code>points1.txt</code>) <a href="http://pastebin.com/0Ws7BxCR" rel="nofollow noreferrer">here</a></p>
  
  <p>I am trying to run this script:</p>
  
  <pre><code>set multiplot
  # plot the contour from the surface1.txt
  unset key
  set dgrid3d
  unset surface
  set contour base
  # these values need to be set (requirement)
  set cntrparam level incremental 0.16, 0.259, 4.47
  set view 0,0
  unset ztics
  splot "surface1.txt" with lines
  # plot the points on the x-y plane
  unset xtics
  unset ytics
  splot "points1.txt"
  unset multiplot
  </code></pre>
  
  <p>and I am getting this output:</p>
  
  <p><img src="https://i.stack.imgur.com/mlGc3.png" alt="enter image description here"></p>
  
  <p>As you can see, the single points that I am trying to put on the x-y plane also comes as contour, what I need to do is:</p>
  
  <ol>
  <li>display the points from "points1.txt" as single points (not contour)</li>
  <li>the plot is zoomed out, I need a full screen image.</li>
  <li>move the y-axis ticks from right to left vertical.</li>
  <li>remove all the colors. I need a grayscale image.</li>
  </ol>
  
  <p>Please help.</p>
  
  <p><strong>EDIT:</strong>
  I have also tried this way --</p>
  
  <pre><code>set contour base
  set cntrparam bspline
  set cntrparam level incremental 0.16, 0.259, 4.47
  set view map
  set dgrid3d
  unset key
  splot 'surface1.txt' nosurface with lines, \
      'points1.txt' nocontour
  </code></pre>
  
  <p>and I am getting this plot --</p>
  
  <p><img src="https://i.stack.imgur.com/AakhZ.png" alt="enter image description here"></p>