title: Error return when running alpha command in r
body: <p>I am trying to complete a cronbach alpha analysis on my dataframe, but am getting an odd error. My dataset is set up like:</p>
  <p>DF</p>
  <pre><code>Var1   Var2   Var3   Var4
   A      12     14     A
   C      14     13     D
  </code></pre>
  <p>etc-----</p>
  <p>I am using the command: alpha(DF[,c(2:3)] and am getting the following error:</p>
  <p>Error: Unknown colour name: c(12, 14,....14, 13</p>
  <p>I am assuming the package I need is being blocked by another. Any help is greatly appreciated.</p>