The Contour Plot command in the Graph menu constructs contours of a response in a rectangular coordinate system. A contour plot shows a three-dimensional surface in two dimensions. Contours delineate changes in the third dimension.
Here are some of the options available with the Contour platform:
• specify the number of contour levels
• choose to plot contour lines or filled contours
• show or hide data points
• label contours with response values
• define and use a custom coloring scheme
Figure 10.1 Examples of Contour Plots