How to force axis values to scientific notation in ggplot

Question

I have the following code:

 library(ggplot2)
 df <- data.frame(y=seq(1, 1e5, length.out=100), x=sample(100))
 p  <- ggplot(data = df, aes(x=x, y=y)) + geom_line() + geom_point()
 p

Which produce this image:

As mentioned in the image above how can I change the y-axis value to scientific notation?

Answer 1

You can pass a format function with scientific notation turned on to scale_y_continuous labels parameter:

p + scale_y_continuous(labels = function(x) format(x, scientific = TRUE))