如何计算R和plot中的1-CDF呢？

Question

I want to plot the 1-CDF in R

I am using the ggplot stat_ecdf

g1=ggplot() +
  stat_ecdf(data=data_ploting, aes(x, colour=ggg), alpha=0.8, geom= "smooth", pad = FALSE) +
  theme_test ()

Answer 1

The base R function ecdf returns a function that you can use in new expressions, including subtracting it from one. You can therefore also use the usual methods for plotting $1-F(x)$. Example:

x <- sort(iris$Sepal.Length)
cdf <- ecdf(x)
plot(x, 1 - cdf(x), type="s")

Answer 2

The ?stat_ecdf help page shows that there is a "Computed variable" y which holds the calculated CDF value. You can get at that value using stat() and then transform it however you like. So, for example, this should work

ggplot(data_ploting) +
  aes(x = x, y = 1-stat(y), colour=ggg) + 
  stat_ecdf(alpha=0.8, geom = "smooth", pad = FALSE)