title: How can I count frequency of 3D plot in Matlab?
body: <p>I have list of 3D points (x,y,z) in each vector.</p>
  <pre><code>matrix[4535x3] = [3,4,2; 3,5,3; 4,5,2; 4,7,6; ...]
  </code></pre>
  <p>I would like to count frequency of each 3D point.
  For example,</p>
  <pre><code>[frequency_count] = function([4535x3 3d(x,y,z) points])
  
  [4;        [3,5,4;
   4;         5,4,4;
   6;    &lt;=   2,5,4;
   .          .
   .          .
   . ]        .     ]
  </code></pre>
  <p>Is there any functions that can count 3d points in matlab? if not how can I do this?</p>