title: How to extract tweet geocode in twitteR package in R
body: <p>Recently Edwin Chen posted a great map of the regional usage of soda vs pop vs coke created from geocoded tweets inolving those words in the context of drinking. <a href="http://blog.echen.me/2012/07/06/soda-vs-pop-with-twitter/" rel="noreferrer">http://blog.echen.me/2012/07/06/soda-vs-pop-with-twitter/</a></p>
  
  <p>He mentions that he used the twitteR package created by Jeff Gentry in R. Sure enough, it is easy to gather tweets that use a given word and put them in a dataframe:</p>
  
  <pre><code>require(twitteR)
  require(plyr)
  cat.tweets&lt;-searchTwitter("cats",n=1000)
  tweets.df = ldply(cat.tweets, function(t) t$toDataFrame() ) 
  </code></pre>
  
  <p>the dataframe (tweets.df) will contain the user id, tweet text, etc. for each tweet, but does not appear to contain the geocode. Any idea on how to get it in R?</p>