title: Error using eps ..... Class must be 'single' or 'double'
body: <p>I'm facing a problem with my code which is the error (using eps ..... Class must be 'single' or 'double'). which due to the following code line</p>
  
  <pre><code>beta=sqrt  (  (0.5*nthroot((Tt + (sqrt(-Delta/27))),3)) + ...
       (0.5*nthroot((Tt - (sqrt(-Delta/27))),3)) -(1/3*T)  );
  </code></pre>