title: How to save Numpy 4D array to CSV?
body: <p>I am trying to save a series of images to CSV file so they can be used as a training dataset for Alexnet Keras machine learning. The shape is (15,224,224,3).</p>
  
  <p>So far I am having issue doing this. I have managed to put all data into a numpy array but now I cannot save it to a file.</p>
  
  <p>Please help.</p>