为什么我不能使用“TermDocumentMatrix”?

我使用了以下命令来统一单数形式的复数单词,但我得到了一个错误。

crudeCorp <- tm_map(crudeCorp, gsub, pattern = "smells", replacement = "smell")
crudeCorp <- tm_map(crudeCorp, gsub, pattern = "feels", replacement = "feel")
crudeDtm <- TermDocumentMatrix(crudeCorp, control=list(removePunctuation=T))
Error in UseMethod("meta", x) : 
  no applicable method for 'meta' applied to an object of class "character"

2、这个命令我用错了吗?

我将把以下代码附加到句子处理和矩阵中。

library(tm)
library(XML)

crudeCorp<-VCorpus(VectorSource(readLines(file.choose())))

#(Eliminating Extra Whitespace) 
crudeCorp <- tm_map(crudeCorp, stripWhitespace)

#(Convert to Lower Case)

crudeCorp<-tm_map(crudeCorp, content_transformer(tolower))


# remove stopwords from corpus

crudeCorp<-tm_map(crudeCorp, removeWords, stopwords("english"))
myStopwords <- c(stopwords("english"), "can", "will","got","also","goes","get","much","since","way","even")
myStopwords <- setdiff(myStopwords, c("will","can"))
crudeCorp <- tm_map(crudeCorp, removeWords, myStopwords)

crudeCorp<-tm_map(crudeCorp,removeNumbers)

crudeCorp <- tm_map(crudeCorp, gsub, pattern = "smells", replacement = "smell")
crudeCorp <- tm_map(crudeCorp, gsub, pattern = "feels", replacement = "feel")

#-(Creating Term-Document Matrices)
crudeDtm <- TermDocumentMatrix(crudeCorp, control=list(removePunctuation=T))

1. I'M HAPPY
2. how are you?
3. This apple is good
(skip)