How can I format axis labels with exponents with ggplot2 and scales?

Question

With the new version ggplot2 and scales, I can\'t figure out how to get axis label in scientific notation. For example:

x <- 1:4
y <- c(0, 0.0001, 0.00         


        

Answer 1

As per the comments on the accepted solution, OP is looking to format exponents as exponents. This can be done with the trans_format and trans_breaks functions in the scales package:

    library(ggplot2)
    library(scales)

    x <- 1:4
    y <- c(0, 0.0001, 0.0002, 0.0003)
    dd <- data.frame(x, y)

    ggplot(dd, aes(x, y)) + geom_point() +
    scale_y_log10("y",
        breaks = trans_breaks("log10", function(x) 10^x),
        labels = trans_format("log10", math_format(10^.x)))