1.
Open the Cities.jmp sample data table.
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.
Note: By default, the contour plot uses Delaunay triangulation for generating the contour plot. From the Contour Plot red triangle menu, select Transform > Range Normalized to change the method for calculating the triangulations to a normalized scale ([0,1]) in both X and Y.
The Alpha slider appears.
Contour Plot for Ozone
Triangulation Data Table
10.
Click and move the Alpha slider to the right to filter out the larger Delaunay triangulation circles.
Alpha Shapes Filter