Categorical Charts
With this feature, the enabled X axis can be used to plot not only values (e.g. number of sales, etc.), but also categories (e.g. months of the year, units, people, etc.). Using a Category axis, the
WPF Chart treats data as a sequence of non-numerical text labels. The marker is placed according to the position of the category in the sequence. Data is provided per category.
As you can see from the image above, RadChart automatically set X-Axis labels to the categories they represent and each numeric value is shown in the corresponding category. Note that the numeric values are from two data series and they share the same category.
To create categorical charts, you have to map the category values to the XCategory property of the DataPoint.
The only difference between categorical charts and a normal chart is the way the data is bound. Categorical charts use XCategory data point member while the other charts use XValue.
If you want to use data binding, then you have to set the DataPointMember to XCategory instead of XValue.
If you are looking for more data binding options take a look at the Populating with Data Overview topic.