title: Short a 2D MxM matrix to a 2D (M-1)x(M-1) matrix from an arbitrari point A[i,j]
body: <p>I'm migrating my MATLAB code to phyton with numpy and scipy.</p>
  
  <p>And I'm looking for a simple order to short a MxM matrix (or 2D array)</p>
  
  <p>Example, I whish to remove all "0" from matrix at column 3 and row 3</p>
  
  <pre><code>[[a a 0 a]
   [a a 0 a]
   [0 0 0 0]
   [a a 0 a]]
  </code></pre>
  
  <p>And take this matrix</p>
  
  <pre><code>[[a a a]
  [a a a]
  [a a a]]
  </code></pre>
  
  <p>With only one line of code in numpy or scipy, if possible.</p>