There are many types of visual expression available to aid in visualization. We are going to briefly discuss the most common and useful ones, and then demonstrate several Java techniques for achieving these types of expression. The choice of graph, or other visualization tool will depend upon the dataset and application needs and constraints.
A bar chart is a very common technique for displaying relationships in data. In this type of graph, data is represented in either vertical or horizontal bars placed along an X and Y axis. The data is scaled so the values represented by each bar can be compared to one another. The following is a simple example of a bar chart we will create in the Using country as the category section:
A pie chart is most useful when you want to demonstrate a value in relation to a larger set. Think of this as a way to visualize how large the piece of pie is in relation to the entire pie. The following is a simple example of a pie chart showing...