How can i clear the rawData?

[Vincenzo]

Hi,

I want to make two curves in one plot, with possibility, that it should draw only one or also both of them. For me (beginner), seems to be the easiest way by clearing the data of one curve. It's hard to explain me it in english...
For example:

1. I have two curves (crv1, crv2).
2. after that i make draw one of them (crv1).
3. i could rewrited the data of crv1, so I could draw the next curve instead of one.
4. Now, I want to draw both of them, it works also (crv1, crv2).
5. But, now if i want draw only the first one, the second curve is still there.

How should i clear the data of curve? Because I didn't find anything, maybe i'm very tired..., or how should i solve this problem?
thanks!

[Vincenzo]

OK, now I found the detach() function, but i think there is still nicer solution...