How to set default size for `geom_line` in ggplot?-CodePudding

I want to change the default thickness of geom_line using the size aesthetic. This question has already been answered

update_geom_defaults does work for changing e.g. the default colour. Any idea what's going on here and how to successfully change the default size?

CodePudding user response：

You could use linewidth to change the thickness like this:

library(tidyverse)

update_geom_defaults("line", list(linewidth = 2))

data(ChickWeight)

ChickWeight %>%
  filter(Chick %in% c("1", "2", "3")) %>%
  ggplot(aes(x = Time, y = weight, colour = Chick))  
  geom_line()

^{Created on 2023-02-02 with reprex v2.0.2}