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.
$ qiime info
System versions
Python version: 3.5.4
QIIME 2 release: 2017.10
QIIME 2 version: 2017.10.0
q2cli version: 2017.10.0
Installed plugins
alignment 2017.10.0
composition 2017.10.0
dada2 2017.10.0
deblur 2017.10.0
demux 2017.10.0
diversity 2017.10.0
emperor 2017.10.0
feature-classifier 2017.10.0
feature-table 2017.10.0
gneiss 2017.10.0
longitudinal 2017.10.0
metadata 2017.10.0
phylogeny 2017.10.0
quality-control 2017.10.0
quality-filter 2017.10.0
sample-classifier 2017.10.0
taxa 2017.10.0
types 2017.10.0
vsearch 2017.10.0
