Java for Data Science

Creating donut charts

Donut charts are similar to pie charts, but they are missing the middle section (hence the name donut). Some analysts prefer donut charts to pie charts because they do not emphasize the size of each piece within the chart and are easier to compare to other donut charts. They also provide the added advantage of taking up less space, allowing for more formatting options in the display.

In this example, we will assume our data is already populated in a two-dimensional array called ageCount. The first row of the array contains the possible age values, ranging again from 19 to 30 (inclusive). The second row contains the number of data values equal to each age. For example, in our dataset, there are six data values equal to 19