While we’re at it, this Saturday’s Business section of the New York Times featured the article Sifting data to Uncover Travel Deals. One of the websites mentioned (PointMaven.com) actually uses a Treemap to display hotel points promotions. OK — full disclosure: this is my husband’s website and yes, I was involved… But hey — that’s the whole point of having an in-house statistician! Continue reading Another Treemap in NYT!
Today much data is gathered from the web. Data from websites often tend to be hierarchical in nature: For example, on Amazon we have categories (music, books, etc.), then within a category there are sub-categories (e.g, within Books: Business & Technology, Childrens’ books, etc.), and sometimes there are ever additional layers. Other examples are eBay, epinions, and almost any e-tailor. Even travel sites usually include some level of hierarchy. The standard plots and graphs such as bar charts, histograms, boxplots might be useful for visualizing a particular level of hierarchy, but not the “big picture”. The method of trellising is … Continue reading Visualizing hierarchical data