title: How to vertically stack trained models in keras?
body: <p>I have two trained models in keras that i want to stack one on the top of another to form one single model. I want to do this to combine my trained models into one.</p>
  
  <p><a href="https://i.stack.imgur.com/SMtuJ.png" rel="noreferrer"><img src="https://i.stack.imgur.com/SMtuJ.png" alt="enter image description here"></a></p>
  
  <p>I think merge(Merge) is for stacking models horizontally whereas I want to stack keras functional API models vertically. </p>
  
  <p>PS : Output 1's shape is identical to Input 2 </p>