title: R: error in mget - invalid first argument
body: <pre><code>library(RMallow)
  dummy = data.frame(item1 = c(1.5, 2, 3, 1, 1, 2),
                     item2 = c(1.5, 3, 1.5, 2, 2, 3),
                     item3 = c(3, 1, 1.5, 3, 3, 1))
  mallows(dummy, G = 1, iter = 10)
  </code></pre>
  
  <p>I'm playing around with the <code>mallows</code> function, but I get the following error: <code>Error in mget(plabels[hasSubclass], env) : invalid first argument</code>. Does anyone know what might be causing this?</p>