'Ordered' is a weak term, perhaps time-dependent is better?

[Gijs-Koot]

I think that any numerical variable has an ordering, otherwise it would be hard to map it to an axis anyway. If a numerical variable has no meaningful ordering, it's more like a categorical variable. I don't know what would be the correct term though. The graphs shown with 'ordered' variables are primarily used with an x-axis that corresponds with time, so perhaps that's a better name for them?

[holtzy]

Hi @Gijs-Koot, Thanks for your feedback. I confess that I'm not a big fan of the term ordered neither.

However time serie is not appropriate neither IMO. An ordered variable is not necessarily a time, even If it is the best example.

I need to keep thinking about that and thank you again for your feedback.