У меня есть текст ниже, и мне нужно извлечь определенные слова до и после определенного слова.
Пример:
sometext <- "about us, close, products & services, focus, close, research & development, topics, carbon fiber reinforced thermoplastic, separators for lithium ion batteries, close, for investors, close, jobs & careers, close, \nselect language\n\n, home > corporate social responsibility > \nsocial report\n > quality assurance\n, \nensuring provision of safe products, \nthe teijin group resin & plastic processing business unit is globally expanding its engineering plastics centered on polycarbonate resin, where we hold a major share in growing asian markets. these products are widely used in applications such as automotive components, office automation equipment and optical discs (blu-ray, dvd). customers include automotive manufacturers, electronic equipment manufacturers and related mold companies. customer data is organized into a database as groundwork to actively promote efforts to enhance customer satisfaction., \nin accordance with iso 9001 (8-4, 8-2), the regular implementation of"
library(stringi)
stri_extract_all_fixed(sometext , c('engineering plastics', 'iso 9001','office automation'), case_insensitive=TRUE, overlap=TRUE)
Фактический результат ниже
[[1]]
[1] "engineering plastics"
[[2]]
[1] "iso 9001"
[[3]]
[1] "office automation"
Требуемый результат:
[1] globally expanding its engineering plastics centered on polycarbonate resin
[2] accordance with iso 9001 (8-4, 8-2), the regular implementation of
В основном нужно извлечь текст до и после упомянутых мною конкретных слов
stri_extract_all_fixed
ссылается на переменнуюprav_1
, которая не определена. Пожалуйста, сделайте ваш пример воспроизводимым. - person drammock   schedule 28.12.2016