Add a Cartesian graph to the project.

myGraph = myApplication.CartesianGraphs:Add()
1. A Cartesian graph is an object and since there may be multiple Cartesian graphs in the project, it is part of the CartesianGraphCollection.
2. Search for CartesianGraphCollection in the Help1.
3. In CartesianGraphCollection, under Method List, search for an applicable method:
:Add()
Application object has collection CartesianGraphs.
CartesianGraphs:Add()
myApplication.CartesianGraphs:Add()
myGraph = myApplication.CartesianGraphs:Add()