CODEWITHSUNDEEP
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veggie crunch burger
veggie crunch burger

Reputation: 61

Subsetting a vector base on another vector

I have 2 input vectors, iv1 and iv2, as shown below. I would like to separate the elements of the second vector according to elements of the first. It works like this: The values in iv2 between the first 2 values of iv1 are stored in ov1, the values in iv2 between the second and third values of iv1 are stored in ov2, and so on. Note: The values in iv1 and iv2 are already in ascending order. Any thoughts please?

Input:

iv1 <- c(100, 200, 300, 400, 435)
iv2 <- c(60, 120, 140, 160, 180, 230, 250, 255, 265, 270, 295, 340, 355, 401, 422, 424, 430)

Desired output:

ov1 = c(120, 140, 160, 180)
ov2 = c(230, 250, 255, 265, 270, 295)
ov3 = c(340, 355)
ov4 = c(401, 422, 424, 430)

Upvotes: 1

Views: 85

Answers (1)

www
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Reputation: 4224

As @RonakShah suggested, the most efficient way in this case may be this:

split(iv2, cut(iv2, breaks = iv1,labels = paste0('ov',1:4)))

Output:

$ov1
[1] 120 140 160 180

$ov2
[1] 230 250 255 265 270 295

$ov3
[1] 340 355

$ov4
[1] 401 422 424 430

Upvotes: 1

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