我有两个数据帧, DF1:匹配排名最高的字在数据帧R列文本
df1 <- c("A large bunch of purple grapes", "large green potato sack", "small red tomatoes", "yellow and black bananas")
df1 <- data.frame(df1)
DF2:
Word <- c("green", "purple", "grapes", "small", "sack", "yellow", "bananas", "large)
Rank <- c(20,18,22,16,15,17,6,12)
df2 <- data.frame(Word,Rank)
DF1:
ID Sentence
1 A large bunch of purple grapes
2 large green potato sack
3 small red tomatoes
4 yellow and black bananas
DF2:
ID Word Rank
1 green 20
2 purple 18
3 grapes 22
4 small 16
5 Sack 15
6 yellow 17
7 bananas 6
8 large 12
我想要做的是;将df2中的单词与“Sentence”列中包含的单词相匹配,并在df1中插入一个包含df2中排名最高的匹配单词的新列。因此,像这样:
DF1:
ID Sentence Word
1 A large bunch of purple grapes grapes
2 large green potato sack green
3 small red tomatoes small
4 yellow and black bananas yellow
我最初用于下面的代码相匹配的话,当然这会创建一个包含所有匹配的单词列:
x <- sapply(df2$Word, function(x) grepl(tolower(x), tolower(df1$Sentence)))
df1$top_match <- apply(x, 1, function(i) paste0(names(i)[i], collapse = " "))
如果一个句子没有匹配'df2'的是,做你想做的只是返回'NA'任何文字?在这种情况下,所有的句子都有匹配,但我只是想确保你没有寻找更一般的东西。 – useR
是的,返回N/A很好,谢谢! – Jammin
另外,你能否提供你的数据为'deput(df1)'deput(df2)'或者你用来生成它们的代码? – useR