在 R 中的多个模式上 grep 给出无法解释的结果

Question

ExecKeywords <- c('cio','cto','cco','coo','ciso','cso','cdo','cdio',
'Chief Information','CIO','Chief Technology Officer','Chief Compliance Officer','Chief Security')

Titles <- c('Director - Customer Success','CIO','Director Cloud Operations',
'Director of Information Technology and Chief Information Security Officer',
'Director, Information Services','Director, Global Information Technology',
'Chief Technology Officer','Sr. Director','COO / CTO Advice Company',
'Director of Information Technology','Director of Technology',
'Vice President, Platform Operations and Information Technology',
'Accounting Manager','VP, Strategy and Programs','IT Director','CTO',
'Director of Network Services','Director','Director, Application Engineering',
'Deputy Director of Technology')

grep(paste(ExecKeywords, collapse = "|"), Titles, value = T)

我正在尝试识别与ExecKeywords中发现的多种模式之一匹配的标题。在ExecKeywords的每个元素之后，在管道之前和管道之后(折叠(放置一个空格似乎都做了一些不同的事情，但不是我想要的。所有帖子都引用了粘贴和折叠方法，但这似乎对我不起作用......我错过了什么吗？忽略案例似乎也没有按预期工作

应该期待这样的回报

'CIO','Director of Information Technology and Chief Information Security Officer','Chief Technology Officer','COO / CTO Advice Company','CTO'

Answer 1

一种选择是将单词边界也设置为pasted，以避免匹配单词中的子字符串

grep(paste0("\b(", paste(ExecKeywords, collapse = "|"), ")\b"),
Titles, value = TRUE, ignore.case = TRUE)
#[1] "CIO"                                                                      
#[2] "Director of Information Technology and Chief Information Security Officer"
#[3] "Chief Technology Officer"                                                 
#[4] "COO / CTO Advice Company"                                                 
#[5] "CTO"