Help with XY intensity graph

[VinnyAstro]

Hi Gerd,

I was gonna send you another confused message ... until I discovered the "Scaling factor" properties of the graph (which I never had to use before ...)
It is still a bit weird for my brain (still want to do a mix of an XY graph with actual coordinates associated with an intensity) but I guess I just need to get used to it.

Here is anyway what I ended up with before sending you this message. (which will obviously result in a colorful line)

 

Thank you for your patience and help.

Vinny.