Better error message for UniFrac distances? - issue #53

[alejandrocs98]

Hi David,

Thanks for developing and maintaining MicroViz, what a wonderful tool.

I would like to suggest changing the error message for this issue: @david-barnett in https://github.com/david-barnett/microViz/issues/53#issuecomment-1162229318. I wanted to calculate UiFrac distances and got this same error. I spent so much time trying different things to fix it and did not expected that the error was simply for a parameter (that with other distances worked fine). Also, as this issue is closed it took me longer to get to the solution.

Thanks!