What do you think about this idea ?

[jte]

What I thought might be nice is adding a view where one could specify a table of values for user variables. Let a user define F1(X) as M*X+B and then enter M and B values in a table (like the build-your-own numeric view lets one enter X values, but with two columns for user entry). Explicitly naming the "family" constants would allow for the names to be used when identifying particular members of the set of functions (when tracing or when in a numeric view).