CODEWITHSUNDEEP
rmathvectorrbind
User800701
User800701

Reputation: 159

R: Multiple Operations on a vector

I have a simple integer vector

 a<- c(5, 11, 20)

I want to apply multiple operations on it, e.g.,

a1<- a+1
a2<- a+2
a3<- a-3

... and then combine the new vectors element wise. In this example, it would be:

new_a<-c(rbind(a1,a2,a3))

Since my original vector is quite large (~10,000), and the operations I want to apply are quite a few (~20), I am wondering if there is a more compact way to do the same?

Upvotes: 0

Views: 157

Answers (1)

user3710546
user3710546

Reputation:

You can use outer function:

a <- c(5, 11, 20)
op <- c(1, 2, -3)

new_a
# [1]  6  7  2 12 13  8 21 22 17

as.vector(t(outer(a, op, "+")))
# [1]  6  7  2 12 13  8 21 22 17

Upvotes: 4

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