Finding the number of unique elements in two vectors in R

Question

I\'m working with two \'lists\' or vectors in R, and I need to find out the number of unique elements in both, together.

I tried doing length(summary(merge(v1, v2

Answer 1

It sounds like you're looking for union:

> union(v1, v2)
[1]  1  2  3  4  5  6 10 11

Answer 2

here is my solution.

p1 <- c(1, 4, 1, 1, 4, 5, 6, 7, 8)
p2 <- c(3, 4, 1, 6, 90, 10, 32)
unique(c(p1, p2))

Answer 3

You can use unlist with union

    unlist(union(a,b))