U.S. Mood Throughout the Day inferred from Twitter

This website is a good illustration of the way one can illuminate a complicated phenomenon using inventive graphics.

Mining Twitter posts for indications of a social condition is a great example of an investigation that is unlikely to influence what is being studies nor inconvenience the people providing the information.

Incidentally, it is interesting to observe that the sunny parts of the United States seem happier than the North East, and that the country is less happy during business hours and happier in the evening.