Basic Analysis and Graphing - SAS

Chapter 14 Creating Contour Plots 379
Contour Plot Platform Options
For level value specification, the Contour Plot platform looks for a numeric column with the same name as
the response column that you specified in the Launch window. The number of rows in the data table defines
the number of levels.
If there is a row state column with color information, those colors are used for the contour levels. Otherwise,
the default platform colors are used.
Revert Contours
This option appears only on the red triangle menu for Contour Plot.
If you have specified your own contours, selecting this option reverts your Contour Plot back to the default
contours.
Contour Plot Save Options
This menu has options to save information about contours, triangulation, and grid coordinates to data
tables.
Save Contours creates a new JMP data table with columns for the following:
• the x- and y-coordinate values generated by the Contour platform for each contour
• the response computed for each coordinate set
• the curve number for each coordinate set
The number of observations in this table depends on the number of contours you specified. You can use the
coordinates and response values to look at the data with other JMP platforms. For example, you can use the
Scatterplot 3D platform to get a three-dimensional view of the pond.
Generate Grid displays a window that prompts you for the grid size that you want. When you click OK, the
Contour platform creates a new JMP data table with the following:
• the number of grid coordinates you requested
• the contour values for the grid points computed from a linear interpolation
Save Triangulation creates a new JMP data table that lists coordinates of each triangle used to construct the
contours.
Use Formulas for Specifying Contours
Most often you construct a contour plot for a table of recorded response values such as the Little Pond data
table. In that case, in the launch window, Use Table Data is checked and the Specify Grid button is
unavailable. However, if a column has a formula and you specify that column as the response (Y), the
Specify Grid button becomes active.
When you click Specify Grid, the window shown in Figure 14.8 appears.