Essential Graphing • Scatterplot Matrix • Example Using a Grouping Variable
Previous
 • 
Next
Example Using a Grouping Variable
This example shows you how to create a scatterplot matrix using a grouping variable.
1.
Select Help > Sample Data Library and open Iris.jmp.
2.
Select Graph > Scatterplot Matrix.
3.
Select Sepal length, Sepal width, Petal length, and Petal width and click Y, Columns.
4.
Select Species and click Group.
5.
Click OK.
Initial Example Using a Grouping Variable
To make the groupings stand out, proceed as follows:
6.
From the red triangle menu, select Density Ellipses > Density Ellipses.
7.
From the red triangle menu, select Density Ellipses > Shaded Ellipses.
Example of a Scatterplot Matrix with Ellipses
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, but use Cluster as the grouping variable.
Example of a Scatterplot Matrix Using a Cluster Variable