From the post:
A word cloud (or tag cloud) can be an handy tool when you need to highlight the most commonly cited words in a text using a quick visualization. Of course, you can use one of the several on-line services, such as wordle or tagxedo , very feature rich and with a nice GUI. Being an R enthusiast, I always wanted to produce this kind of images within R and now, thanks to the recently released Ian Fellows’ wordcloud package, finally I can!
In order to test the package I retrieved the titles of the XKCD web comics included in my RXKCD package and produced a word cloud based on the titles’ word frequencies calculated using the powerful tm package for text mining (I know, it is like killing a fly with a bazooka!).
I don’t care for word clouds but some people find them very useful. They certainly are an option to consider when offering your users views into texts.
Follow the pointers in this article to some of the on-line services or tweak your own in R.