我有一个数据框如下:
str(data)
'data.frame': 255 obs. of 3 variables:
$ Group : Factor w/ 255 levels "AlzGroup1","AlzGroup10",..: 1 112 179 190 201 212 223 234 245 2 ...
$ Gender : int 1 1 0 0 0 0 0 1 0 0 ...
$ Description: Factor w/ 255 levels "A boy's on the uh falling off the stool picking up cookies . The girl's reaching up for it . The girl the lady "| __truncated__,..: 63 69 38 134 111 242 196 85 84 233 ...
在“描述”列中我有255个演讲,我想在每个语音中添加一个包含动词数量的数据框的列,我知道如何获取动词的数量,但下面的代码给出了描述中的动词总数柱:
> library(NLP);
> library(tm);
> library(openNLP);
NumOfVerbs=sapply(strsplit(as.character(tagPOS(data$Description)),"[[:punct:]]*/VB.?"),function(x) {res = sub("(^.*\\s)(\\w+$)", "\\2", x); res[!grepl("\\s",res)]} )
有谁知道如何在每次演讲中获得动词的数量?
感谢您的帮助!
Elahe
答案 0 :(得分:0)
假设您使用的功能类似于此功能(在此处找到:could not find function tagPOS):
tagPOS <- function(x, ...) {
s <- as.String(x)
word_token_annotator <- Maxent_Word_Token_Annotator()
a2 <- Annotation(1L, "sentence", 1L, nchar(s))
a2 <- annotate(s, word_token_annotator, a2)
a3 <- annotate(s, Maxent_POS_Tag_Annotator(), a2)
a3w <- a3[a3$type == "word"]
POStags <- unlist(lapply(a3w$features, `[[`, "POS"))
POStagged <- paste(sprintf("%s/%s", s[a3w], POStags), collapse = " ")
list(POStagged = POStagged, POStags = POStags)
}
创建一个计算包含字母'VB'
count_verbs <-function(x) {
pos_tags <- tagPOS(x)$POStags
sum(grepl("VB", pos_tags))
}
并使用dplyr
按Group
进行分组,并使用count_verbs()
进行汇总:
library(dplyr)
data %>%
group_by(Group) %>%
summarise(num_verbs = count_verbs(Description))