Last Update: 3/29/2020
There are several ways you can add a boundary to a contour plot of XYZ worksheet data. There are three options found on the Plot Details Contouring Info tab:
Another option is to use the free Concave Hull App to draw a concave hull around the data points
The App takes XY input and outputs Concave Hull Xn and Concave Hull Yn. Use this XY data to define a Custom Boundary as outlined above.
Keywords:concave hull, convex hull, Custom Boundary, Data Boundary, Layer Boundary, interpolation, Contouring info