Helper function for kwic designed to parse sequence matches into contexts and keywords.
kwic_split(char, mask, window)
## Not run: ------------------------------------ # kwic_split(letters[1:5], c(0, 1, 1, 0, 1), window = 1) # kwic_split(letters[1:5], c(1, 1, 1, 0, 1), window = 1) ## ---------------------------------------------