感谢您抽出宝贵时间阅读我的帖子。新手在这里,这是我的第一个带有一些样本数据的R脚本。
library(tm)
library(hunspell)
library(stringr)
docs <- VCorpus(VectorSource('He is a nice player, She could be a better player. Playing basketball is fun. Well played! We could have played better. Wish we had better players!'))
input <- strsplit(as.character(docs), " ")
input <- unlist(input)
input <- hunspell_stem(input)
input <- word(input,-1)
input <- VCorpus(VectorSource(input))
docs <- input
docs <- tm_map(docs, content_transformer(tolower))
docs <- tm_map(docs, removeWords, stopwords("english"))
docs <- tm_map(docs, removePunctuation)
docs <- tm_map(docs, stripWhitespace)
dtm <- TermDocumentMatrix(docs)
m <- as.matrix(dtm)
sort(rowSums(m),decreasing=TRUE)
返回以下结果:
character0 48更好3打3篮球1描述1
有趣1头1小时1语言1元1分1好1 原产地1井1希望1年1
预期结果:
更好3玩3篮球1乐趣1语言1不错1井1 希望1
不确定这些词的来源(character0,description,meta,language等)以及是否有办法摆脱它们?
基本上我要做的就是在hunspell的语料库(数据源sql server表)上应用词干,然后在文字云中显示它们。任何帮助,将不胜感激。 GD
答案 0 :(得分:0)
以下是评论中的示例失败的原因:
library(tm)
library(hunspell)
hunspell_stem(strsplit('Thanks lukeA for your help!', "\\W")[[1]])
# [[1]]
# [1] "thank"
#
# [[2]]
# character(0)
#
# [[3]]
# [1] "for"
#
# [[4]]
# [1] "your"
#
# [[5]]
# [1] "help"
这是让它发挥作用的一种方法:
docs <- VCorpus(VectorSource('Thanks lukeA for your help!'))
myStem <- function(x) {
res <- hunspell_stem(x)
idx <- which(lengths(res)==0)
if (length(idx)>0)
res[idx] <- x[idx]
sapply(res, tail, 1)
}
dtm <- TermDocumentMatrix(docs, control = list(stemming = myStem))
m <- as.matrix(dtm)
sort(rowSums(m),decreasing=TRUE)
# for help! lukea thank your
# 1 1 1 1 1
如果没有茎,这将返回原始标记,如果有多个茎,则返回最后一个茎。