R [ggplot2] 如何设置刻度大小？

Question

I'm trying to set ticks size, but when I specify axis.ticks parameter, ticks become horizontal on both axes. For example

data <- data.frame(x =c(1:10), y = c(1:10) )
ggplot(data, aes(x, y)) + 
  geom_point() +
  theme(axis.ticks = element_line(size = 5))

http://prnt.sc/dlwv0i

And angle parameter doesn't work.

ggplot2 version 2.2.0.9000

Any help would be appreciated.

Answer 1

You may do:

ggplot(data, aes(x,y)) + 
    geom_point() + 
    theme(axis.ticks.length=unit(.25, "cm"))

This is from https://ggplot2.tidyverse.org/reference/theme.html