比较R中的两个向量并将结果保存到新向量

Question

I need to compare two vectors in R like:

A
[1,2,2,2,2,3]

B
[2,3,4,1,1,1]

They both have the same length so i need to compare A with B and find the maximum value and save it to a new vector C, in this case it would be:

C
[2,3,4,2,2,3]

how can i do it? Thanks in advance

Answer 1

Try this:

> C <- ifelse(A>B, A, B)
> C
[1] 2 3 4 2 2 3

Answer 2

This is what pmax (parallel max) is for:

A <- c(1,2,2,2,2,3)
B <- c(2,3,4,1,1,1)
C <- pmax(A, B)
# [1] 2 3 4 2 2 3

If your vectors are in a list or data.frame , you can use do.call to pass the list to pmax .

l <- list(A, B)
do.call(pmax, l)