我试着用tm_map
.它给出了以下错误.我怎样才能避开这件事?
require(tm)
byword<-tm_map(byword, tolower)
Error in UseMethod("tm_map", x) :
no applicable method for 'tm_map' applied to an object of class "character"
我试着用tm_map
.它给出了以下错误.我怎样才能避开这件事?
require(tm)
byword<-tm_map(byword, tolower)
Error in UseMethod("tm_map", x) :
no applicable method for 'tm_map' applied to an object of class "character"
使用基本R功能tolower()
:
tolower(c("THE quick BROWN fox"))
# [1] "the quick brown fox"