爲什麼我不能使用「TermDocumentMatrix」？

Question

爲什麼我不能使用「TermDocumentMatrix」？

我用下面的命令以單數形式統一複數單詞，但是我得到一個錯誤。

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" 

我該如何解決？ 1.是否有從單數變爲清潔的命令？ 2.這個命令我用錯了嗎？

我將下面的代碼附加到句子的處理和矩陣。

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)) 

例如：我的數據

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

Answer 1

Whyn't下面的代碼使用了詞幹&標點符號去除？

crudeCorp <- tm_map(crudeCorp, removePunctuation) 
crudeCorp <- tm_map(crudeCorp, stemDocument, language = "english") 
crudeDtm <- DocumentTermMatrix(crudeCorp) 

希望這會有所幫助！