A recent article made two points regarding the graphical presentation of information. The points derive from a study that presented four kinds of graphics and asked a group of doctors to rate a pair their characteristics: were the graphs correct and were they enjoyable to look at. The doctors said that an “icon graph” was the most accurate depiction of the data, compared to a table, a bar graph, or a pie chart, though it was also the least enjoyable.
Since icon graphs are new to me, let me describe the one the article showed. The icon graph had for rows and four columns of squares. Some of the squares were solid green, some solid red, and some had a diagonal line through them from the top left to the bottom right. Thus, each cell conveyed one of four combinations: either color and lined or not. That’s a lot of information to convey in one graphic!
For example, if you had four categories of law firms you retained last year, by number of lawyers, and you had several ranges of fees paid, an icon graph could locate the appropriately colored/lined square for each firm over its fees paid during the year.