slightly redundant because it sorts twice, but vectorised,
paste(pmin(a,b), pmax(a,b))
Edit: alternative with ifelse
,
ifelse(a < b, paste(a, b), paste(b, a))
slightly redundant because it sorts twice, but vectorised,
paste(pmin(a,b), pmax(a,b))
Edit: alternative with ifelse
,
ifelse(a < b, paste(a, b), paste(b, a))