„How do you feel?“ is a application based on Processing.

It reads tweets for a specified grographic region from the Twitter Streaming API with help of twitter4j. The app calculates an semantic score based on the text for ever tweet (see SentimentAnalyzer.pde). For that purpose, it uses the sentimenal dictionary by Warriner et.al..

The app visualizes the tweets and their sentiment on a map view and prints the latest tweets on the screen.