请提供数据的可复制示例.

Please provide a reproducible example of your data.

只需假设您要执行的操作即可:

Just assuming what you're trying to do:

data <- data.frame(x = rep(1:10,1), y = rep(11:20, 1))

data %>% 
  rowwise() %>% 
  mutate(mean = mean(x + y + ...))

根据您的评论:填写x + y + ...