title: CABS(x) function for complex(8)
body: <p>Is there an absolute value function for a complex value in double precision? When I try <code>CABS()</code> I get </p>
  
  <pre><code>            V(1,j) = R(j,j) + (R(j,j)/cabs(R(j,j)))*complexnorm2(R(j:m,j))
  </code></pre>
  
  <blockquote>
    <p>"Error: Type of argument 'a' in call to 'cabs' at (1) should be
    COMPLEX(4), not COMPLEX(8)"</p>
  </blockquote>
  
  <p>I have read there's a function called <code>CDABS()</code> but I wasnt sure if that was the same thing?</p>