Question

我正在尝试查找水星的最小值，平均值，中位数，最大值，标准偏差和方差。我不确定如何找到某列。我一直在尝试使用代码data（mean），但无法正常工作。我已附上图片。enter image description here

Answer 1

您可以尝试使用dplyr语法的_if软件包

library(dplyr)
data %>%
  summarise_if(is.numeric, funs(mean, sd, var, min, max, median))

我认为这可以满足您的需求。

Answer 2

您可以对数据框中的列使用dplyr :: summarise（）函数：

library(dplyr)

df <- data.frame(
  School = c("A R Kaufman Public School", "Abraham Erb Public School", "Alpine Public School", "Avenue Road Public School", "Ayr Public School", "Baden Public School"),
  Mercury = c(50, 29, 38, 1, 61, 16),
  Lead = c(10, 8, 15, 16, 0, 3),
  PCB = c(532, 440, 518, 487, 517, 491),
  Arsenic = c(9, 6, 10, 2, 13, 4))

summarise(df, min = min(Mercury),
          max = max(Mercury),
          mean = mean(Mercury),
          median = median(Mercury),
          sd = sd(Mercury),
          var = var(Mercury))

#   min max mean median       sd   var
# 1   1  61 32.5   33.5 22.02499 485.1

如何在R中找到分类列的均值

2 个答案: