Iso line is a confusing term

[edlongman]

https://github.com/omnetpp/docs.omnetpp.org/blob/545675fffb9af81fee17d67c2f3924a3c310e8dd/docs/tutorials/pandas/index-src.md#L461 and https://github.com/omnetpp/docs.omnetpp.org/blob/545675fffb9af81fee17d67c2f3924a3c310e8dd/docs/tutorials/pandas/index-src.md#L530

Personally I had never heard of it and had to look it up. "Series" would be a much better term (as used in ms excel) in the first instance and just saying connected is enough in the second.

If it is used although I think "contour line" would be more easily understood, it should definitely be without the space given google ngram usage.

This is also the case for the omnet6 configure chart window which uses the term iso line without explanation.

[avarga]

Good observation, thanks! We are changing the terminology we use in the dialog of the new Analysis Tool. We considered several alternatives in the dialog including "isometric variable", "series", "group by" etc, and their combinations.

I'm leaving this bug open until I update the tutorial (which needs some brush-up anyway).