在R中,很容易将矩阵变成箱线图
> myMatrix
[,1] [,2] [,3] [,4] [,5] [,6] [,7] [,8] [,9] [,10]
[1,] 27 32 31 28 20 28 10 29 15 29
[2,] 31 33 20 28 21 9 14 21 34 33
[3,] 27 33 28 23 26 33 19 11 26 30
[4,] 33 17 10 31 10 32 10 29 31 28
[5,] 25 10 29 34 32 33 28 32 32 32
[6,] 32 19 13 32 26 20 9 26 32 33
[7,] 33 32 18 26 27 28 29 32 24 25
[8,] 33 34 32 30 27 31 22 32 33 30
[9,] 32 34 31 22 17 31 11 27 18 23
[10,] 26 10 30 30 27 4 4 4 4 4
> boxplot(as.data.frame(myMatrix))
如何在ggplot中完成同样的事情?
答案 0 :(得分:8)
您可以使用melt()函数,然后使用geom_boxplot()。 首先重现数据(感谢Excel):
vec <- c(c(27, 32, 31, 28, 20, 28, 10, 29, 15, 29),
+ c(31, 33, 20, 28, 21, 9, 14, 21, 34, 33),
+ c(27, 33, 28, 23, 26, 33, 19, 11, 26, 30),
+ c(33, 17, 10, 31, 10, 32, 10, 29, 31, 28),
+ c(25, 10, 29, 34, 32, 33, 28, 32, 32, 32),
+ c(32, 19, 13, 32, 26, 20, 9, 26, 32, 33),
+ c(33, 32, 18, 26, 27, 28, 29, 32, 24, 25),
+ c(33, 34, 32, 30, 27, 31, 22, 32, 33, 30),
+ c(32, 34, 31, 22, 17, 31, 11, 27, 18, 23),
+ c(26, 10, 30, 30, 27, 4, 4, 4, 4, 4))
myMatrix <- matrix(data=vec, ncol=10, byrow=TRUE)
然后融化并绘制:
library(reshape)
library(ggplot2)
ggplot(data=melt(as.data.frame(myMatrix)), aes(variable, value)) + geom_boxplot()
另外,正如Hadley(很久以前)在评论中所建议的那样,没有必要将矩阵转换为数据框:
ggplot(data=melt(myMatrix), aes(as.factor(X2), value)) + geom_boxplot()