Compute N-Grams

Description

Compute the n-grams (contiguous sub-sequences of length n) of a given sequence.

Arguments

x

a sequence (vector).

n

a positive integer giving the length of contiguous sub-sequences to be computed

Value

a list with the computed sub-sequences.

Examples

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s <- "The quick brown fox jumps over the lazy dog"
## Split into words:
w <- strsplit(s, " ", fixed = TRUE)[[1L]]
## Word tri-grams:
ngrams(w, 3L)
## Word tri-grams pasted together:
vapply(ngrams(w, 3L), paste, "", collapse = " ")