Problem with bin size in spatial_skill

[daniel-caichac-DHI]

Hi,

I think that there is some problem with bin selection in the spatial plots when the bins are not fully defined by the user
as (min,max,delta).
To exemplify this. I got track observations between Lat=[+31.4 , +65.62] deg

then if I define my bin spacing as 0.25deg and make a spatial skill starting from +32deg to +66deg I get data as expected between 32 and 66deg

but if instead I just go with binsize=0.25 and let fmskill define the min and max Latitude I get


ie, I see that my data now starts a roughly Latitude=+36deg even though the bin size is still 0.25deg.
I am somehow losing 4deg of data (~400 km of satellite data).
Not ideal. Most likely a bug.

cc: @Hendrik1987

[Hendrik1987]

I can confirm this after discussion with @daniel-caichac-DHI . I do further remember that the 'auto binning' when the user provide binsize was a challenge when implementing the spatial skill in the first place. Then I looked mainly at a global data set and likely have not tested all special cases sufficiently.
We need to review after else: https://github.com/DHI/fmskill/blob/e17d88db6bb473e48ddede4c6d7dbd267cce04f9/fmskill/comparison.py#L681
Quick fix is to not allow binsize argument.