title: Undefined function or variable 'vl_nnconv'
body: <p>I install MATLABRB2015 MATLAB  follwing tool BOX                                               </p>
  
  <ul>
  <li>Version 8.6         (R2015b) Computer Vision System Toolbox          </li>
  <li>Version 7.0         (R2015b) Image Acquisition Toolbox               </li>
  <li>Version 4.10        (R2015b) Image Processing Toolbox                </li>
  <li>Version 9.3         (R2015b) Parallel Computing Toolbox              </li>
  <li>Version 6.7         (R2015b) Signal Processing Toolbox               </li>
  <li>Version 7.1         (R2015b) Statistics and Machine Learning Toolbox </li>
  <li>Version 10.1        (R2015b)</li>
  </ul>
  
  <p>..
  When I use <code>y = vl_nnconv(x, w, []) ;</code>
  MATLAB give this error <strong>Undefined function or variable 'vl_nnconv'.</strong>
  HOW this will solve?</p>