title: NAs introduced by coercion error on Numeric Data Frame
body: <p>I am trying to cluster a Data Frame but when I run the dist Function I get the error "NAs introduced by coercion".</p>
  
  <p><a href="https://i.stack.imgur.com/qat7S.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/qat7S.png" alt="Error message"></a></p>
  
  <p>At first I thought if was becuase my DF contained factor vectors, like this:</p>
  
  <p><a href="https://i.stack.imgur.com/evZX7.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/evZX7.png" alt="Data Frame "></a></p>
  
  <p>but I then made a new DF with just numeric values and had the same error message:</p>
  
  <p><a href="https://i.stack.imgur.com/QLuaO.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/QLuaO.png" alt="New DF"></a></p>
  
  <p>So I am not sure why I am getting this error message, what is it I am not seeing ?</p>