What do you think about this idea ?

[Tim Wessman]

Standard list processing would be used - so your F1 and F3. Introducing a new syntax wouldn't be such a great idea.

However, these are not the problem areas. The problem starts to happen when you have places where there are different numbers of curves/results in different places on the curve. For example, somewhere where you had this:

peicewise(x<2,{1,2,3}*X,SIN(-{1,2}))

Things like that can really throw the graphing engine for a loop and it is unclear exactly how best to handle it. Once we figure out how to do so the rest is pretty easy since automatic list processing already exists.