如何创建均值+标准差数据。框架

我们可以按“类型”分组并使用 summarise_all . 假设我们要对 mean 和 sd 并获得摘要列

library(dplyr)
f %>%
   group_by(type) %>% 
   summarise_all(funs(mean(.) + round(sd(.), 2), mean(.)- round(sd(.), 2)))
# A tibble: 2 x 7
#    type `A_+` `B_+` `C_+` `A_-` `B_-` `C_-`
#   <fctr> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl>
#1      a 34.07 27.69 17.41 19.93  9.31 14.59
#2      b 23.62 31.45 37.49 19.38 21.55 20.51

如果需要 character 班

f %>%
  group_by(type) %>%
  summarise_all(funs(paste(mean(.), round(sd(.), 2), sep=" ± ")))
# A tibble: 2 x 4
#    type           A           B         C
#   <fctr>       <chr>       <chr>     <chr>
#1      a   27 ± 7.07 18.5 ± 9.19 16 ± 1.41
#2      b 21.5 ± 2.12 26.5 ± 4.95 29 ± 8.49