title: Weka clustering using word frequency csv file
body: <p>I have a csv file in this format:</p>
  
  <p><code>&lt;userName&gt;, word1=&lt;word1Frequency&gt;, word2=&lt;word2Frequency&gt;, ...</code></p>
  
  <p>The first problem is, this csv file does not have a header, which is required by WEKA. What should the header be like? Should it just be 
  <code>username, word1, word2, ...</code> </p>
  
  <p>Also, to import for clustering, is it OK if it put 1 file per user under a common directory? I am very new to this. I have used mallet before so feel free to use reference of mallet. </p>
  
  <p>Any help will be highly appreciated. </p>
  
  <p>Thanks!</p>