Basic Analysis and Graphing - SAS

492 Creating Scatterplot Matrices Chapter 20
Example Using a Grouping Variable
Create a Grouping Variable
If your data does not already have a grouping variable, you can create one using the Cluster platform. Using
the Iris.jmp data, assume that the Species column does not exist. You know that the data comes from three
species of Iris flowers, so you want to create three clusters within a group.
Proceed as follows:
1. Using the Iris.jmp sample data table, select Analyze > Multivariate Methods > Cluster.
2. Select Sepal length, Sepal width, Petal length, and Petal width and click Y, Columns.
3. Click OK.
4. From the red triangle menu, select Number of Clusters.
5. Type 3 to represent the three different Iris species.
6. Click OK.
7. From the red triangle menu, select Save Clusters.
8. Close the Hierarchical Cluster report window, and go back to the Iris.jmp data table.
You can see that a Cluster column has been added to the Iris.jmp data table.
9. Perform the Scatterplot Matrix analysis. Follow the instructions in the section “Example Using a
Grouping Variable” on page 490, but use Cluster as the grouping variable.
Figure 20.9 Example of a Scatterplot Matrix Using a Cluster Variable