title: Colors and a plotting term document matrix
body: <p>Following the example of plotting a term-document matrix below,</p>
  
  <pre><code>library("tm")
  
    data("crude")
  
    tdm &lt;- TermDocumentMatrix(crude, control = list(removePunctuation = TRUE,
                                                    removeNumbers = TRUE,
                                                    stopwords = TRUE))
  
    plot(tdm, terms = findFreqTerms(tdm, lowfreq = 6)[1:25], corThreshold = 0.5)
  </code></pre>
  
  <p>Is there a way to colorize the nodes based on how many vertices they have? Is there an example of making the nodes with more vertices larger or something to that effect as well?</p>