title: How to read some fixed number of elements from an array in octave?
body: <p>I have an array of 102300000 elements. and I want to make two arrays from the elements of this array like this:</p>
  <ol>
  <li>One array should have the elements from the following indices of the original array:
  <code>index = 1-20,41-60, 81-100, 121-140 and so on</code></li>
  <li>The other should have the elements from the following indices of the original array:
  <code>index = 21-40, 61-80, 101-120, 141-160 and so on</code></li>
  </ol>
  <p>Does anyone have an idea how to implement this?</p>