A Curve object is simply created by
c = Curve()
Likewise, a Graph object is created like
this:
g = Graph()
The Curve object now needs to be added to
the Graph object:
g.add(c)
Alternatively, in the GUI, selecting
File->New->Graph and Curve creates both
performs exactly the same operations. However, to fill values into the
Curve object, it must be referenced by a Python
variable: To this end, first select the Curve
object and then choose Object->Assign to Python
variable... (see also Section 5.5).
