In my metadata, totally I have 50 variables. Some variables are categorized as 1,2,3. But when I did faith-pd-group-significance.qzv, it said
"The following metadata categories have been omitted because the metadata was numerical, not categorical: F002, ANClt1000, Creat, Sample.description, ALC, Sample.number, Albumin, Exp.number, ZarsScore, CCI, F106, F014020, Recurrence90, WBC, Age, ANC, SevereCDI, ALClt1000, Group, MRN, Hornsindexseverity".
Actually, the numbers describe the categories. But I am not sure how to change their format in .tsv file to make them category? Or I have to change their name to include strings?