'Genogeographer' package, problem with 'profile_AA_x0' function

Question

[Giulia.cosenza]

Hi, can anybody help me with a little question I have? I'm trying to use the profile_AA_x0 function of the R package 'Genogeographer'. It has the following usage description:

Usage

profile_AA_x0 (AA_profile, df, select = c("locus", "x0"), keep_dropped = FALSE)

Arguments

AA_profile:
A tibble/data.frame with columns 'locus', 'A1' and 'A2' holding the separated version of a genotype, eg. AG -> A1: A, A2: G

df: The database with main alleles per locus

select:
Which columns to return

keep_dropped : Logical. Keep the non-matching alleles (compared to 'db') and those with genotype 'NN'

Can anybody explain me how does a "database with main alleles per locus" look like? I do not understand what should I put in the variable df.

Thank you