Word shift graphs for the happiest city and saddest city.

<p>These show how varies for all US cities considered versus the cities Napa, California (left) and Beaumont, Texas (right), having the highest and lowest respectively. Words are ranked in order of decreasing percentage contribution to the overall average happiness difference . The symbols indicate whether a word is relatively happy or sad compared to for the entire US (text ), while the arrows indicate whether the word was used more or less in the text for each city than in . The left inset panel shows how the ranked LabMT words combine in sum. The four circles at bottom right show the total contribution of the four kinds of words (, , , ). Relative text size is indicated by the areas of the gray squares.