title: How to visualize values stored in a 2D matrix?
body: <p>I have an array of floating point values ranging from 0.0 to 70000.0 and I want to visualize this data in a 3D surface. I want something like this:
  <img src="https://i.stack.imgur.com/lc0RC.png" alt="enter image description here"></p>
  
  <p>I have no idea how to do this. I don't even know what this type of graph is actually called. Should I use Matlab? I haven't used Matlab before but I have access to a machine which has Matlab installed on it...</p>