Hi,

I wanted to generate a random sample, plot it on a histogram, add a normal distribution to the background, but got the error message:

*Error in dnorm(mean = mu, sd = sigma) : *

- argument "x" is missing, with no default*

Code was the following:

mu <- 5

sigma <- 1

n <- 10

ntraject <- 500

random_matrix <- rnorm(n * ntraject, mean = mu, sd = sigma) %>%

matrix(nrow = n, ncol = ntraject) %>%

tibble()

ggplot(data = data.frame(x=colMeans(random_matrix)),aes(x=x)) +

stat_function(fun=dnorm(mean = mu, sd = sigma), geom = "area", alpha = .3) +

geom_histogram(color = "black")

(If I ignore the line "stat_function...", then it works fine, for the histogram)

Thank you for your help in advance,

MarcellGranat