r - Create all subvectors of a certain length (moving window)

Question

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

I have a vector

vec <- c(1,2,3,4,5)

What is the best way to retrieve all subvectors of a given length? For example, all subvectors with the length 3 would be:

1,2,3
2,3,4
3,4,5

Thank you for your help!

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1 Answer

深蓝 · Answer 1 · 2021-10-23T18:25:53+0000

answered Oct 24, 2021 by 深蓝 (71.8m points)

Try this:

k <- 3
embed(vec, k)[, k:1]

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