title: R:More than 52 levels in a predicting factor, truncated for printout
body: <p>Hi I'm a beginner in R programming language. I wrote one code for regression tree using rpart package. In my data some of my independent variables have more than 100 levels. After running the rpart function
  I'm getting following warning message "<strong>More than 52 levels in a predicting factor, truncated for printout</strong>" &amp; my tree is showing in very weird way. Say for example my tree is splitting by location which has around 70 distinct levels, but when the label is displaying in tree then it is showing  "ZZZZZZZZZZZZZZZZ..........." where I don't have any location called "ZZZZZZZZ"</p>
  
  <p>Please help me.</p>
  
  <p>Thanks in advance.</p>