Additional Example of Contour Plots

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Essential Graphing • Contour Plots • Additional Example of Contour Plots

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Additional Example of Contour Plots

This example illustrates how to create a triangulation data table, to transform the triangulation to use Delaunay triangles, and to filter Alpha shapes of the triangles.

1.

Select Help > Sample Data Library and open Cities.jmp.

2.

Select Graph > Contour Plot.

3.

Select Ozone and click Y.

4.

Select X and Y and click X.

5.

Select to Fill Areas.

6.

The Contour Plot for Ozone appears.

7.

From the Contour Plot red triangle menu:

a.

Select Transform > Range Normalized.

Instead of Delaunay triangulation, this changes the method for calculating the triangulations to a normalized scale ([0,1]) in both X and Y.

b.

Select Show Control Panel.

The Alpha slider appears.

Figure 6.10 Contour Plot for Ozone

8.

Click and move the Alpha slider to the right.

Figure 6.11 Alpha Shapes Filter

Using the Alpha slider filters out the larger Delaunay triangulation areas.

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Help created on 7/12/2018