R Ggplot2：将直方图 y 轴更改为小数位

Question

I am trying to change the y axis (Proportion) of the right histogram into decimal places like the left histogram using ggplot. I tried using geom_histogram(aes(y=..ncount..) but the bars end up squashed. Any other suggestions?

Help desperately needed!

Thanksss

Answer 1

I will give you an example using the mtcars dataset. To change the y-axis decimals to what you want, you should use the scales package which has the function number_format . If you run the following command number_format(accuracy = 0.1) in the labels of scale_y_continuous you will get the right decimals. You can use the following code as an example:

library(tidyverse)
library(scales)
mtcars %>%
  ggplot(aes(x = mpg)) +
  geom_histogram(aes(y=..count../sum(..count..))) +
  ylab("Proportion") +
  scale_y_continuous(
    labels = scales::number_format(accuracy = 0.1))

Output:

As you can see, the decimals for the y-axis are in the right format.