Я использовал функцию rm_stopwords
из пакета qdap
, чтобы удалить стоп-слова и знаки препинания из текстового столбца в моем фрейме данных.
library(qdap)
library(dplyr)
library(tm)
glimpse(dat_full)
Observations: 500
Variables: 9
$ reviewerID <chr> "ABF0ARHORHUUC", "AH4KMS2YC6TXA", "A2IXK5LB...
$ asin <chr> "B00BE6C9S0", "B009X78DKU", "B0077PM3KG", "...
$ reviewerName <chr> "stuartm \"stuartm\"", "HottMess", "G. Farn...
$ helpful <list> [<1, 2>, <0, 0>, <0, 0>, <0, 0>, <0, 0>, <...
$ reviewText <chr> "I've used the Mophie juice pack for my iPh...
$ overall <dbl> 3, 5, 5, 5, 5, 3, 3, 5, 5, 5, 5, 4, 5, 5, 3...
$ summary <chr> "Case issues limit utility of this device",...
$ unixReviewTime <int> 1375142400, 1355356800, 1383350400, 1367193...
$ reviewTime <chr> "07 30, 2013", "12 13, 2012", "11 2, 2013",...
full_dat$reviewText = rm_stopwords(full_dat$reviewText,
tm::stopwords("english"), strip = TRUE)
Функция возвращает список столбца reviewText.
glimpse(full_dat)
Observations: 500
Variables: 9
$ reviewerID <chr> "ABF0ARHORHUUC", "AH4KMS2YC6TXA", "A2IXK5LB...
$ asin <chr> "B00BE6C9S0", "B009X78DKU", "B0077PM3KG", "...
$ reviewerName <chr> "stuartm \"stuartm\"", "HottMess", "G. Farn...
$ helpful <list> [<1, 2>, <0, 0>, <0, 0>, <0, 0>, <0, 0>, <...
$ reviewText <list> [<"used", "mophie", "juice", "pack", "ipho...
$ overall <dbl> 3, 5, 5, 5, 5, 3, 3, 5, 5, 5, 5, 4, 5, 5, 3...
$ summary <chr> "Case issues limit utility of this device",...
$ unixReviewTime <int> 1375142400, 1355356800, 1383350400, 1367193...
$ reviewTime <chr> "07 30, 2013", "12 13, 2012", "11 2, 2013",...
Любая идея о том, как ее предотвратить (т.е. сохранить исходный формат) или отменить / удалить столбец и вернуть исходный формат?
Результат должен быть таким же, как в исходном кадре данных, но без стоп-слов и знаков препинания.
Вот небольшой вывод:
structure(list(reviewerID = "A3LWYDTO7928SH", asin = "B00B0FT2T4",
reviewerName = "D. Lang", helpful = list(c(0L, 0L)), reviewText = "When I first put your glass protector on my phone I was blown away! (I knew how "degrading" the soft plastic covers were - ruining my experience, so I chose not to have a protector on my screen.) Then I saw your website and I wondered if it was as good as spoken about. The answer is YES. The application was flawless even after I pulled the glass back off because I had not put it on absolutely perfectly. It repositioned with ease and you could not find a bubble if you had a microscope! Fascinating to see the viscous material on the back spread out on its own! Application could not be easier and the quality of the product seems like it came from NASA.",
overall = 5, summary = "It is as perfect as a product can get - Really!",
unixReviewTime = 1396569600L, reviewTime = "04 4, 2014"), row.names = 145945L, class = "data.frame")