title: what is the correct inputs for cv.basicfacerecognizer
body: <p>I am trying to provided sample code for cv.facerecognition in mexopencv - Matlab, but i am getting an error in cv.facerecognition which says</p>
  
  <p>Undefined function or variable 'BasicFaceRecognizer_'.</p>
  
  <pre><code>Error in cv.BasicFaceRecognizer (line 131)
              this.id = BasicFaceRecognizer_(0, 'new', ftype, varargin{:});
  
  </code></pre>
  
  <p>I couldn't find any solution for  that, i appreciate your support  </p>
  
  <p>thanks</p>