我试图标记POS用于从Yelp的数据集的挑战下载的评论文章的文本（第11轮）。下面列出的是我写的功能：
r <- unlist(lapply(rec_texts, function(x) { str_split(x, "\n") }))
R_tagPOS <- function(x, ...) {
r <- as.String(x)
word_token_annotator <- Maxent_Word_Token_Annotator()
a2 <- Annotation(1L, "sentence", 1L, nchar(r))
a2 <- annotate(r, word_token_annotator, a2)
a3 <- annotate(r, 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)
}
POS_R <- lapply(r, R_tagPOS)
但它返回这样的结果：
Error in e(s, a) : no word token annotations found
8.stop("no word token annotations found")
7. e(s, a)
6.paste(y$id, y$type, y$start, y$end, sep = "\r")
5.merge.Annotation(a, e(s, a))
4.merge(a, e(s, a))
3.annotate(r, Maxent_POS_Tag_Annotator(), a2)
2.FUN(X[[i]], ...)
1.lapply(r, R_tagPOS)
该rec_texts来自Yelp的数据集挑战的评论文章。
Classes 'tbl_df', 'tbl' and 'data.frame': 2000 obs. of 1 variable:
$ text: chr "Mix is such a beautiful restaurant and you have a gorgeous
view of the strip while you're enjoying your dinner!"|
__truncated__"WooooooHooooo 100th review!!! I eat here all the time,
but I've gotta take the chance to be the 100th review.\"| __truncated__
"My bf and I came for a small snack and some brews. We got the pretzel
and cheese appetizer. The pretzel was ver"| __truncated__ "The food was
amazing! This is a must for me now when I come visit Las Vegas! Everyone
was very friendly. The ow"| __truncated__ ...
请问有没有人遇到这种情况或任何人知道如何解决这个问题呢？林认为它有事情做与数据。由于此代码的工作蛮好的由第三方提供的另一种评论文本数据集。
我收到了同样的错误消息，在我的情况我在我的琴弦的向量有一个空元素。
一旦我删除从我的矢量的所有空元素的它工作得很好。