title: Matlab 3D plot with 2 variable different range
body: <p>Plot this graph using Matlab with function as follows:</p>
  
  <p>R(t1,t2) = 0 ........ t1&lt;0 or t2&lt;0</p>
  
  <pre><code>       = 1 ...... t1&gt;T and t2&gt;T
  
         = min(t1,t2)/T , otherwise
  </code></pre>
  
  <p>T is time interval</p>