Attributes, properties are added to an associated category, we can for example add the spoken language (english: 1, French: 2 etc) which gives us a new column associated with Country.
I try to "select" or link the French speaking countries but without creating a new category (like country * language with english = 0)
Is it possible ? This is more of a normalization problem than programming on R but I know there are a lot of statisticians here
(The final idea, just in case, is to propose an indicator of relevance or compatibility (in%) for the search)
Your problem description is pretty confusing to me and I'm not entirely sure what it is you like to do (i.e. what the output should look like).
Can you generate a reprex of the problem and also provide an actual example of what the input / output should look like. A reprex consists of the minimal code and data needed to recreate the issue/question you're having. You can find instructions how to build and share one here:
That's my problem actually, i don't know what the outpoot should like.
"Normaly" to linked categories, we just , as "women with children" is "women (=1, men =0) "Children" (=n) but here i want to avoid it.