analysis on historical data, it is not useful when wanting to use timely or frequently updated data.

Scenario: You would like to tap into news sources to analyze the political events that are changing by the hour and people’s comments on these events. These events could be analyzed to summarize the key discussions and debates in the comments, rate the overall sentiment of the comments, find the key themes in the headlines, see how events and commentary change over time, and more. You need a collection of recent political events or news scraped every hour so that you can analyze these events.

This is the online home of Geocomputation with R, a book on geographic data analysis, visualization and modeling.

Good example using the World Bank's API, and others like Twitter, Facebook, ProPublica Congress, U.S. Census Bureau, Oxford Dictionaries, United Nations Data