Basic Analysis and Graphing - SAS

Chapter 14 Creating Contour Plots 373
Example of a Contour Plot
Example of a Contour Plot
To create a contour plot, you need two variables for the x- and y-axes and at least one more variable for
contours. You can also use several y-variables. This example uses the Little Pond.jmp sample data table. X
and Y are coordinates of a pond. Z is the depth.
1. Open the Little Pond.jmp sample data table.
2. Select Graph > Contour Plot.
3. Select the X and Y coordinates and click X.
4. Select the depth, Z, and click Y.
Note: In a contour plot, the X1 and X2 roles are used for the X and Y axes.
5. Click OK.
Figure 14.2 Example of a Contour Plot with Legend
The x- and y-axes are coordinates and the contour lines are defined by the depth variable. This contour plot
is essentially a map of a pond showing depth.
Launch the Contour Plot Platform
Launch the Contour Plot platform by selecting Graph > Contour Plot.
By default, the contour levels used in the plot are values computed from the data. You can specify your own
number of levels and level increments in the Launch window before you create the plot. You can also do so
in the red triangle menu for Contour Plot after you create the plot. You can use a column formula to
compute the contour variable values.