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.
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
8.
Click and move the Alpha slider to the right.
Alpha Shapes Filter