title: Why I got the wrong mean value in R?
body: <p>I am trying to calculate the mean of <code>-0.9643991</code> and <code>-0.6756494</code>, but for some reasons, the mean function returns the value of the first number; as shown below:</p>
  <pre><code>&gt; a = -0.9643991
  &gt; b = -0.6756494
  &gt; mean(a, b)
  [1] -0.9643991
  </code></pre>
  <p>What is the issue here?</p>