title: fast way to stack vectors into a matrix in Python
body: <p>I want to stack 100k vector of the same lentgh (500) into a single matrix in python but it takes too much time.</p>
  
  <p>here is my code:</p>
  
  <pre><code>stacked = all_vectors[0]
  for i in range(1,100000):
      stacked = np.column_stack((stacked ,all_vectors[i]))
  </code></pre>
  
  <p>Do you know how to make this quicker?</p>