Как сохранить TM VCorpus с пользовательской мета в R - PullRequest
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Как сохранить TM VCorpus с пользовательской мета в R

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/ 30 октября 2018

Я сохраняю корпус ТМ в R. 

writeCorpus(as.character(thecrp), dirdst, filenames = NULL)

Все нормально, пока не получу ошибку: 

Error in UseMethod("meta", x) : no method applicable for meta applicable to an object of class "character"

NB. Я добавил три пользовательских метаполя в каждый документ в корпусе.

Вот воспроизводимый пример: 

# Create corpus from a folder of documents on disk
thetxts <- readtext(pthtxt, cache = FALSE)
thecrp <- corpus(thetxts)
# Add docvars (= columns)
# Reference
# NOTE: Add Meta to the corpus
meta(thecrp, tag = "doctyp", type = "corpus") <- "Reports, 2018"
# NOTE: Add Meta to each of the documents
for (i in 1:length(thecrp)){
    # ID derived from the name of the file (withdraw .txt)
    meta(thecrp[[i]], tag = "id", type = "indexed") <- gsub("\\.txt", "", meta(thecrp[[i]], tag = "id", type = "indexed"))
    # constants
    meta(thecrp[[i]], tag = "author", type = "indexed") <- "author"
    meta(thecrp[[i]], tag = "type", type = "indexed") <- "individual"
    meta(thecrp[[i]], tag = "prov", type = "indexed") <- "ocr"
}
# Then I perform usual and **mildly** transformative actions on the corpus
...
# Then I save it to disk: the **error occurs here**
dirdst <- "~/test"
writeCorpus(as.character(thecrp), dirdst, filenames = NULL)
...