我尝试根据组不包含异常的条件筛选出组-参见以下数据集:
df <- structure(list(
group_id = c(1, 1, 1, 2, 2, 2, 3, 3, 3),
sound = c("standard", "standard", "deviant", "standard", " standard ", " standard ", "deviant", " standard", " standard")),
.Names = c("group_id", "soudn"),
row.names = c(NA, -9L),
class = "data.frame")
因此,我想保留第1组和第3组,因为这两个组都存在偏差(这是我们要寻找的条件),但删除第2组,因为偏差不存在。
1条答案
按热度按时间fwzugrvs1#