Gneiss on collapsed FeatureTable

Hi @mortonjt,

Collapsing beforehand would merge many singletons features into the same taxon labels thus eliminating the need to exclude them before running Gneiss. However, I still filter any remaining singletons features from the collapsed table afterwards.
If the balance-taxonomy collapses internally why sometimes the same taxon can be found in both the numerator and denominator?
Best,
Ali