Please provide the reference for the variable 'diagnosis' which includes more than 2 levels: UC, CD, nonIBD

[uqvirg]

Hi,
thank for your package.
I've just done a small test and had the error:

fit_data = Maaslin2(

• input_data = input_data,
• input_metadata = input_metadata,
• output = "demo_output",
• fixed_effects = c("diagnosis", "dysbiosis"))
  [1] "Creating output folder"
  [1] "Creating output figures folder"
  2021-04-23 16:56:06 INFO::Writing function arguments to log file
  2021-04-23 16:56:06 INFO::Verifying options selected are valid
  2021-04-23 16:56:06 INFO::Determining format of input files
  2021-04-23 16:56:06 INFO::Input format is data samples as rows and metadata samples as rows
  2021-04-23 16:56:06 INFO::Formula for fixed effects: expr ~ diagnosis + dysbiosis
  Error in Maaslin2(input_data = input_data, input_metadata = input_metadata, :
  Please provide the reference for the variable 'diagnosis' which includes more than 2 levels: UC, CD, nonIBD

Can you let me know how I can resolve this error before to use my own data.
Thank you,
Virgg

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