balance-taxonomy CSV header inconsistencies

[thermokarst]

Bug Description
When the artifact generated by qiime gneiss balance-taxonomy is exported with qiime tools export, the resulting files include a “numerator.csv” and “denominator.csv” file.

The “usual” header line in these files contains: Feature ID,0,1,2,3,4,5,6.

However, if the file only contains only one feature, then the header becomes: ,0,1,2,3,4,5,6. The Feature ID is missing. This isn’t a big deal unless one tries to aggregate multiple “numerator.csv” and “denominator.csv” files together, which then produces some problems.

References
Ported wholesale from the forum

[ChrisKeefe]

The balance_taxonomy visualizer was removed in v2020.2. Ok to close this?