10.1 Overview of Data Attributes

The DataObject class provides methods that can be grouped into two categories: methods that provide access to the data and methods that describe how to represent the data in graphs or analyses. The first category includes methods such as GetVarData and AddVar. These methods retrieve data or add a variable to the data object; they are described in the previous chapter.

In contrast, the second category of methods affect attributes of the data. Examples of attributes include the color and shape of an observation marker. These properties affect the way that the data are displayed in graphs.