Re: [R] To build a new Df from 2 Df

Hello, here's a draft of a solution. I hope it's not overly complicated. # find all possible combinations combi <- expand.grid(Dem$Nom, Rap$Nom); names(combi) <- c("Dem", "Rap") # we need the corresponding departments and units combi$DemDep <- apply(combi, 1, function(x) Dem$Departement[x[1] ==

Re: [R] seqinr ?: Splitting a factor name into several columns. Dealing with metabarcoding data.

I'm not sure I understood your problem, maybe like this: # split identifiers into columns df1 <- data.frame(cbind(X = 1:10, Y = rnorm(10)), Z.identifierA.B1298712 = factor(rep(LETTERS[1:2], each = 5))) id <- names(df1)[3] x <- do.call(rbind, str_split(id, "\\.")) y <- sapply(x,