CODEWITHSUNDEEP
regexrindexing
joaoal
joaoal

Reputation: 1992

Remove end of each number in a vector in R

I have a vector like this:

a <- c(11223344,55667788)

I would like to create a new vector cutting of the last two numbers of each entry in a:

[1] 112233 556677

Do I have to use regex to achieve this or is there a simple indexing trick that I'm not aware of?

Upvotes: 2

Views: 86

Answers (3)

Rich Scriven
Rich Scriven

Reputation: 99331

You can use substr (or substring), cutting the number of characters off at two before the end

a <- c(11223344, 55667788)
substr(a, 1, nchar(a)-2)
# [1] "112233" "556677"

wrapping in as.numeric if necessary.

Upvotes: 3

Gregor Thomas
Gregor Thomas

Reputation: 145775

If they're integers:

> trunc(a / 100)
[1] 112233 556677

Only if they're strictly positive, you could use floor:

> floor(a / 100)
[1] 112233 556677

Upvotes: 5

akrun
akrun

Reputation: 887128

Or you could use sub

 as.numeric(sub('..$','', a))
 #[1] 112233 556677

Upvotes: 6

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