How to plot one variable in ggplot?

Question

I\'m searching but still can\'t find an answer to a quite simple question - how can we produce a simple dot plot of one variable with ggplot2 in R?

with plot<

Answer 1

library(ggplot2)
qplot(1:nrow(iris), Sepal.Length, data = iris, xlab = "Index")

or

ggplot(data = iris, aes(x = 1:nrow(iris), y = Sepal.Length)) +
    geom_point() +
    labs(x = "Index")