Custom eucast rules, changing multiple antibiotics, and warnings

[theanita1]

I'm trying to create a set of custom rules, and wondering if there's a way I can change multiple antibiotics at the same time if they meet the conditions and not get the warning "In nax != nay : longer object length is not a multiple of shorter object length"

An example of the current code I have looks like this
name == "Staphylococcus aureus" & TCY == "S" ~ c(DOX, MFX) == "S",

the chatgpt suggested I change it to
name == "Staphylococcus aureus" & TCY == "S" ~ DOX== "S" & MFX== "S",
which didn't work at all
So now I'm writing individual lines

name == "Staphylococcus aureus" & TCY == "S" ~ DOX== "S", 
name == "Staphylococcus aureus" & TCY == "S" ~ MFX== "S",

Which ultimately works and doesn't throw me warnings, but it's long......