ggplot缩放单位格式千位小数

Question

Complete noob to R/RStudio/tidyverse. Using R 3.4.0 "You Stupid Darkness" / RStudio 1.0.136. Trying to format y axis to display thousands to 1 decimal place. I'm using : scale_y_continuous(labels = scales::unit_format("k", 1e-3)) but displays as a whole number. How can I display 1 decimal place so instead of 30k, I get 30.1k?

Thx

Answer 1

如果您需要更灵活的功能，建议您使用自己的自定义函数并将其插入scale_y_continuous如下所示：

library(ggplot2)

# custom formatting function
scaleFUN <- function(x) sprintf("%.1fk", x/1000)

# setup diamonds dataset to display something in the thousands
diamonds2 <- diamonds
diamonds2$price <- diamonds2$price * 100

# make your plot and label using the custom scaleFUN function
ggplot(diamonds2, aes(x = carat, y = price)) + 
  geom_point() + 
  scale_y_continuous(name = 'Price ($K)', 
                     labels = scaleFUN)