title: Find the inverse of a Matrix in MATLAB, is inv(A) or A\eye(size(A)) more precise?
body: <p>The title explains it already. If I need to find an inverse of a matrix, is there any reason I should use <code>A\eye(size(A))</code> instead of <code>inv(A)</code>? 
  And before you ask: Yes, I really need the inverse, not only for calculations. </p>
  
  <p>PS: </p>
  
  <pre><code>isequal(inv(A), A\eye(size(A)))
  ans =
   0
  </code></pre>
  
  <p>So which one is more precise?</p>
  
  <p><strong>UPDATE</strong>: This question was closed as it appeard to be a duplicate of the question "<a href="https://stackoverflow.com/questions/1419580/why-is-matlabs-inv-slow-and-inaccurate">why is inv in MATLAB so slow and inaccurate</a>". This question here differs significantly by not addressing the speed, nor the accuarcy of the function <code>inv</code> but the difference of <code>inv</code> and <code>.\eye</code> to calculate the true inverse of a matrix. </p>