filter_accession: Filter UniProt accessions by count
In evanamartin/TopPICRDMS: What the Package Does (One Line, Title Case)

Filters out UniProt accessions that occur in fewer than threshold project IDs. Accessions are counted by the count_by argument. For example, if threshold is 10 and count_by is Gene all rows containing UniProt accessions that occur in fewer than 10 project IDs will be removed. UniProt accessions are counted within Gene.

1	filter_accession(x, count_by, threshold = 10)

`x`	...
`count_by`	A Character string indicating what variable observations should be counted by (e.g., Gene, ProteoForm, ...).
`threshold`	An integer indicating the number of subjects (or project IDs) a UniProt accession must occur in to be kept. The default is 10.