Match -> ZeroDivisionError about py-eddy-tracker

[AntSimi]

Did you compare tracking file or detection?
If it's tracking file :

• did you take care at time axis?
• did you used virtual observation?

[acapet]

I'm using Tracking files, ie. result files from the tracking script, containing eddies for an entire year.

• I don't get what you mean by "did you take care at time axis?", could you be a bit more specific ?
• I have tested both with (VIRTUAL_LENGTH_MAX: 2, in the .yml file) and without (VIRTUAL_LENGTH_MAX: 0) virtual. Same result.

[acapet]

Sorry, there's a mistake in my previous comment.
Not considering virtual eddies, ie. tracking with without (VIRTUAL_LENGTH_MAX: 0), prevents the error.

[AntSimi]

Axis time
I you use match function between your year datasets, it will search match without take care of time, so you could associate eddy from t0 with t100, ...

In order to compare only eddies from same day you could use :

for index_1, index_2, t0, t1 in dataset_1.align_on(dataset_2):
    local_d1 = dataset_1.index(index_1)
    local_d2 = dataset_2.index(index_2)

Virtual and match function
match function use contour to find overlap, in case of virtual , you have no defined contour(or more accurate : a contour with an area of 0), you could put a contour deduced from interpolated radius to avoid this problem.

[AntSimi]

You could now use circle_contour method with option only_virtual=True to set circle contour only for virtual