how do you combine two large vectors of different sizes into a single tibble?

Question

I have two vectors, x and y, of different lengths. I want a tibble where every value of x is repeated for every value of y.

x <- c("a", "b") 
y <- c(1, 2, 3)

example tibble:

x   y
a   1           
a   2           
a   3           
b   1           
b   2           
b   3           

Answer 1

Use expand.grid(x,y).

> expand.grid(x,y)
  Var1 Var2
1    a    1
2    b    1
3    a    2
4    b    2
5    a    3
6    b    3