cartesian product with dplyr R

Question

I\'m trying to find the dplyr function for cartesian product. I\'ve two simple data.frame with no common variable:

x <- data.frame(x=c(\"a\",\"b\",\"c\"))         


        

Answer 1

When faced with this problem, I tend to do something like this:

x <- data.frame(x=c("a","b","c"))
y <- data.frame(y=c(1,2,3))
x %>% mutate(temp=1) %>% 
inner_join(y %>% mutate(temp=1),by="temp") %>%
dplyr::select(-temp) 

If x and y are multi-column data frames, but I want to do every combination of a row of x with a row of y, then this is neater than any expand.grid() option that I can come up with