ggplot2 y-axis ticks not showing up on a log scale

问题

I am trying to use ggplot2 to create a boxplot graph but I am having trouble getting the ticks to show up as it does in the examples of the ggplot2 webiste.

Here is some fake data of tastiness of fruits:

apples <- data.frame(fruit=c(rep("apple", 30)), taste=runif(30, 30, 50)
banana <- data.frame(fruit=c(rep("banana", 30)), taste=runif(30, 300, 500))
orange <- data.frame(fruit=c(rep("orange", 30)), taste=runif(30, 3000, 5000))
fruits <- rbind(apples,banana,orange)

If I plot as in the ggplot2 website example the y-axis scale should looks something like:

Instead I get an axis like:

ggplot(fruits, aes(fruit, taste) ) +  geom_boxplot() + scale_y_log10()

How would I get the y-axis scale on scientific notation?

回答1:

I'm assuming that you are using the new 0.9.0 version of ggplot2, which underwent a large amount of changes. This happens to be one of them, I believe.

If I recall correctly, enough people complained about the exponential format being the default, that this was changed. As per the transition guide you can achieve the same effect via:

library(ggplot2)
library(scales)
ggplot(fruits, aes(fruit, taste) ) +  
    geom_boxplot() + 
    scale_y_log10(breaks = trans_breaks('log10', function(x) 10^x),
                  labels = trans_format('log10', math_format(10^.x)))

来源：https://stackoverflow.com/questions/9651903/ggplot2-y-axis-ticks-not-showing-up-on-a-log-scale