- data <-
- tibble(x = rep(c("a", "b", "c"), 3),
- y = c(1:8, NA)) %>%
- arrange(x)
- data %>%
- group_by(x) %>%
- summarise(Not_NA = ifelse(any(is.na(y)), NA, TRUE)) %>%
- drop_na() %>%
- inner_join(data, by = "x") %>%
- select(-Not_NA)
不知道有没有更简单的方法。


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