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Modeling and Multivariate Methods - SAS

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542 Plotting Surfaces Chapter 23<br />

Launching the Platform<br />

Figure 23.6 Formula <strong>and</strong> Data Points Launch <strong>and</strong> Output<br />

Isosurfaces<br />

Isosurfaces are the 3-D analogy to a 2-D contour plot. An isosurface requires a formula with three<br />

independent variables. The Resolution slider determines the n×<br />

n×<br />

n cube of points that the formula is<br />

evaluated over. The Value slider in the Dependent Variable section picks the isosurface (that is, the contour<br />

level) value.<br />

As an example, open the Tiretread.jmp data table <strong>and</strong> run the RSM for 4 Responses script. This produces a<br />

response surface model with dependent variables ABRASION, MODULUS, ELONG, <strong>and</strong> HARDNESS.<br />

Now launch Surface Plot <strong>and</strong> designate the three prediction columns as those to be plotted.

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