如何使用ggplot2在不更改原始值的情况下指定图形中第一个刻度的值？

install.packages("ggplot2")

library(ggplot2)

data(mtcars)

p <- ggplot(data = mtcars, aes(x = mpg, y = wt))

p <- p + scale_x_continuous(breaks = seq(mtcars$mpg[1], max(mtcars$mpg), by = 5), labels = seq(mtcars$mpg[1], max(mtcars$mpg), by = 5))

p <- p + geom_point() + theme_minimal()

library(ggplot2)
data(mtcars)

p <- ggplot(data = mtcars, aes(x = mpg, y = wt))
p <- p + scale_x_continuous(breaks = seq(mtcars$mpg[1], max(mtcars$mpg), by = 5), labels = seq(mtcars$mpg[1], max(mtcars$mpg), by = 5))
p <- p + geom_point() + theme_minimal()

print(p)