How to order a series of boxplots by medium or medium?
The command used: boxplot(base$y~base$FID) sorts the graphics in the order of the base variable $ FID, I would need the ordering to be done by the mean or median of the base variable $ y.
Follow example example:
FID y
1 -0,078
1 3,855
1 2,287
1 2,112
2 -0,245
2 0,462
2 1,282
2 1,128
3 -0,058
3 -0,990
3 -0,144
3 -1,336
4 -0,120
4 -4,286
4 -1,295
4 -1,022
5 1,242
5 2,599
5 2,278
5 3,032
You need to transform the FID variable into factor in an orderly fashion.
This can be done like this:
dados <-
data.frame(
FID = rep(1:5, each = 5),
y = 25:1
)
medianas <- tapply(dados$y, dados$FID, median)
dados$FID <- factor(dados$FID, levels = names(medianas)[order(medianas)])
boxplot(y ~ FID, data = dados)
Here I ordered by the median, to sort by average, just change the command tapply(dados$y, dados$FID, median) by tapply(dados$y, dados$FID, mean) .