Typo in function defintion

[RaymondBalise]

In the file 15-RStudio-essentials/1-Writing-Code/sample-script.R the definition of barchart has z listed twice and the function uses z where it should use x. It should be x, z to match the video.

barchart <- function(x, z, width = 0.9) {
require(ggplot2)

counts <- table(x)
df <- data.frame(
value = names(counts),
count = as.numeric(counts)
)

ggplot(df) +
geom_bar(aes(x = value, y = count), stat = "identity", width = width)
}

[carneybill]

@garrettgman Could you take a look?