First of all: I noticed that it was pretty late last night; I put in some weird things in my sheet. Pure nonsense...
Today I started all over again, from the start.
So I filled in your methods and found out only the first method works for me. It gives me a correct plot.
When I started trying this in the beginning (my own thoughts about the method), what I did wrong was actually mixing method '(1)' and '(2)', which ended up not working.
I did know in what kind of direction I had to look/search, but too bad: it didn't work out without your help.
So thanks for clearing that up.
But for method '(2)': it doesn't give me a plot, like it does with method '(1)'. I don't understand why, cause it doesn't give any errors up front.
For method '(3)': I never seen this 'combination' of commands before. It gives me a delimiters-error, which is weird to me, cause I've matched all of them correctly (well, probably not otherwise it doesn't come up with that error!).
The internet doesnt't give me any answers about it.
I think it is important for me to know these methods, and I should memorize them.
PS. I hope the Enter work this time?!