Update at +4:
Seeing the concrete messages I believe that it's just a language barrier here. You did try to explain yourself, but given that you're in a room full of people interested in R, I can understand that somebody would be skeptic about your real intentions.
It's good that you brought it up anyway. There's nothing wrong with an honest discussion.
with the primary intent of provoking readers into an emotional response or of otherwise disrupting normal on-topic discussion
They probably thought you were asking a question just to disrupt their current discussion or make them angry about something.
Typical (hypothetical) trolling in Super User chat:
HEy u guyz like Micro$oft or Apple lol? — ihatewindowz 21:10
I don't see any other reason for accusing you of trolling, other than posting nonsense questions just to attract attention or provoke others.
More generally, I think it's hard to enter chat as a new user, just to ask new questions. Most people on chat will know each other already and maybe can't help you or even don't want to. You definitely shouldn't pester them with questions (e.g. by @-mentioning them constantly). Not an accusation, just a precaution.