带有参数范围的ggplot2绘图函数

Question

I would like to plot the following function, using ggplot2.

change <- function(score, d, k, p) {k*(score - 1/(1+k^(d/p)))}

I would like to see the results as a function of argument d. What's wrong with the following code?

library(ggplot2)
ggp <- ggplot(data.frame(x=c(0:10)), aes(x)) + 
    stat_function(fun=change, args=list(1, x, 100, 400))
ggp

Answer 1

Pass the arguments as a named list(without x ) works:

ggp <- ggplot(data.frame(x=c(0:10)), aes(x)) + 
    stat_function(fun=change, args=list(score=1, k=100, p=400))

From the help page :

args: list of additional arguments to pass to fun