How to create a function that finds the number of equal values in two vectors In R

Question

I have vector a = 10:15 and vector b = 13:17, So How can I create a function that tells me the number of equal values. The result is 3. (because the same values are 13,14,15). Thank you

question from:https://stackoverflow.com/questions/65884889/how-to-create-a-function-that-finds-the-number-of-equal-values-in-two-vectors-in

Answer 1

foo <- function(x, y) length(intersect(x, y)) 

a <- 10:15
b <- 13:17
foo(a, b)
# [1] 3