title: Need help translating python code (with Numpy) to Matlab equivalent
body: <p>I'm working on a XOR Neural Network, that uses a Sigmoid activation function.
  I have a working python code but I need to translate one of the lines into a code that MATLAB understands. I have looked up the documentation on NumPy and I know that it has it's own array operators. I just cannot put together a working MATLAB equivalent for <code>dH</code>. This portion is in an explicit for-loop.
  <code>
      dZ = E * sigmoid_(Z)                        # delta Z
      dH = dZ.dot(Wz.T) * sigmoid_(H)             # delta H
  </code></p>
  
  <p>An explanation would also help me to further my understanding. If my full code is required don't hesitate to ask, but I know that it will not be needed.</p>