R 我是否可以使用多个变异项来构建顺序列(标记多个问题)

你需要在你的ifelse()中使用paste0().您也可以使用%in%而不是|来进行多个"或"匹配.您还可以将多个语句添加到单个mutate().从您向Issues列添加的内容来看，我猜您是想找出问题，以便更正相应的列？在首选名称的情况下，可以将首选名称从FirstName复制到Preferred Name.如果是这样的话，更新你的问题，包括你的最终目标是什么，我会更新我的答案.如果没有，这个解决方案就好了.

library(dplyr)

df <- data.frame(
  PreferredName  = "",
  FirstName = c("Mary", "Harold (Harry)", "Ben", "Tristian (Tri)", "Julia"),
  County = c("", "Other", "Warren", "Butler", ""),
  Date = as.Date("2024-02-15"),
  Address = c("123 Street", "42 Ave", "", "", "520 Road")
)

df_cor <- df %>%
  mutate(Issues = ifelse((PreferredName == "" & grepl("\\(", FirstName)), 
                         "Preferred Name ", ""),
         Issues = ifelse(County %in% c("USA", "", "Other", "N/A") & 
                           Date >= as.Date("2023-08-01"), 
                         paste0(Issues, "County "), Issues),
         Issues = ifelse((Address == "" & Date >= as.Date("2023-08-01")), 
                         paste0("Address ", Issues), Issues),
         Issues = trimws(Issues))

df_cor
  PreferredName      FirstName County       Date    Address                 Issues
1                         Mary        2024-02-15 123 Street                 County
2               Harold (Harry)  Other 2024-02-15     42 Ave  Preferred Name County
3                          Ben Warren 2024-02-15                           Address
4               Tristian (Tri) Butler 2024-02-15            Address Preferred Name
5                        Julia        2024-02-15   520 Road                 County