NaN% in international lineages plot

[corneliusroemer]

I've used covSpectrum for hundreds of hours but I can't remember seeing NaN% ever!

https://cov-spectrum.org/explore/World/AllSamples/from%3D2024-02-09%26to%3D2025-06-06/variants?nextcladePangoLineage=LF.7.1*&

[chaoran-chen]

Thanks for opening the issue, @corneliusroemer! Interesting, I can't remember whether I've ever seen "NaN", but am surprised that something changed because we haven't changed the code in a long time and also not upgraded any related dependencies.

I believe that NaN is being shown when there are no sequences in a week. Which behavior would you envision?