title: 3D array to 2D array - ignoring a dimension
body: <p>I have a very large 3D array containing some data - 2 x 10000 x 4000. I'm going to be processing some of this data but I don't need to know about the first dimension (2). </p>
  
  <p>Is there a simple way to take my 2 x 10000 x 4000 3D array and create a 2D array with the dimensions 10000 x 4000? Can this be done <strong>without</strong> going through a for loop? Is there a copy function or something similar that allows me to copy over an arrays elements for a single dimension (or multiple) into a brand new array?</p>