r语言 - "错误：解压缩 tm 包后找不到函数"create_matrix"

Question

当我尝试使用 R 运行此代码时遇到问题：

library(RTextTools)
library(e1071)
pos_tweets =  rbind(
  c('I love this car', 'positive'),
  c('This view is amazing', 'positive'),
  c('I feel great this morning', 'positive'),
  c('I am so excited about the concert', 'positive'),
  c('He is my best friend', 'positive')
)
neg_tweets = rbind(
  c('I do not like this car', 'negative'),
  c('This view is horrible', 'negative'),
  c('I feel tired this morning', 'negative'),
  c('I am not looking forward to the concert', 'negative'),
  c('He is my enemy', 'negative')
)
test_tweets = rbind(
  c('feel happy this morning', 'positive'),
  c('larry friend', 'positive'),
  c('not like that man', 'negative'),
  c('house not great', 'negative'),
  c('your song annoying', 'negative')
)
tweets = rbind(pos_tweets, neg_tweets, test_tweets)

# build dtm
matrix= create_matrix(tweets[,1], language="english", 
                      removeStopwords=FALSE, removeNumbers=TRUE, 
                      stemWords=FALSE) 

我收到此错误！

"Error: could not find function "create_matrix

在我安装软件包之前，代码工作正常，但现在当我安装 tm 软件包时出现此错误。

请问有什么想法吗？

Answer 1

首先你需要安装"slam">

#install devtools if you have not installed 
install.packages('devtools')
library(devtools)
slam_url <- "https://cran.r-project.org/src/contrib/Archive/slam/slam_0.1-37.tar.gz"
install_url(slam_url)