r - enc2utf8(x) : argumemt is not a character vector 中的错误

Question

Error in enc2utf8(x) : argumemt is not a character vector 是我尝试在 R 3.1.2 中运行下面的代码时遇到的错误。如果我在这里遗漏了什么，有人可以帮助我理解吗？

使用的操作系统是Windows

#Text Cleaning: tm Code
  clean<-function(text){
  library(NLP)
  library(tm)
  sample<- Corpus(VectorSource(text),readerControl=list(language="english"))
  sample<- tm_map(sample, function(x) iconv(enc2utf8(x), sub = "bytes"))
  sample<-tm_map(sample,removePunctuation)
  sample <- tm_map(sample, stripWhitespace)
  sample<-tm_map(sample,removeNumbers)
  sample<-tm_map(sample,removeWords,stopwords('smart'))
  sample <- tm_map(sample, stripWhitespace)
  sample <- tm_map(sample, stripWhitespace)
  dtm <- DocumentTermt(sample[1:3])Matrix(sample)
  return(list(sample,dtm))
  }
 fileName <- 'input.txt'
 test = readChar(fileName, file.info(fileName)$size)
 clean (test)

Answer 1

您必须引用语料库的content，即sample$content中的字符向量:

tm_map(sample, function(x) iconv(enc2utf8(x$content), sub = "bytes"))

在这里，我将 enc2utf8(x) 替换为 enc2utf8(x$content)。