Question

我有两列“标题”，其中包含“什么是物理？”等数据。另一栏“内容”包含“物理学是......的研究”等数据。我想要像['是'，'物理']这样的共同文本。必须对所有数据行执行此操作。如何使用R？

实现这一目标

此致

Answer 1

我认为您需要以下内容：

df <- data.frame(col1=c('what is physics?', 'set cover is NP hard', 'abstract algebra'), 
                 col2=c('Physics is the study of...', 'Example of an NP complete problem is 3-SAT', 'linear algebra'),
                 stringsAsFactors = FALSE)
#       col1                col2
# 1     what is physics?    Physics is the study of...
# 2 set cover is NP hard    Example of an NP complete problem is 3-SAT
# 3     abstract algebra    linear algebra

apply(df, 1, function(x) intersect(tolower(unlist(strsplit(gsub('[^a-zA-Z\\s]+', ' ', x[1]), split=' '))), 
                               tolower(unlist(strsplit(gsub('[^a-zA-Z\\s]+', ' ', x[2]), split=' ')))))

#[[1]]
#[1] "is"      "physics"

#[[2]]
#[1] "is" "np"

#[[3]]
#[1] "algebra"

如何查找包含字符串值的常用文本表格2列？

1 个答案: