Get other shapes in R for geom_point

Question

I need to replicate this exact visualisation but i can't find those shapes in R. How can I find, for example, the first shape from here which is square inside the square?

ggplot(df, aes(x=x_column,y=y_column, shape=shape, color=shape))+geom_point(size=4)+scale_shape_manual(values=c(0:25))enter image description here I implemented this code but the default values of shapes in R aren't the same as in sample plot

Answer 1

Those are standard shapes, but points are layered with different sizes.
Building on reference examples of Aesthetic specifications and geom_point() :

library(ggplot2)

shapes <- data.frame(
  shape = c(0:25),
  x = 0:25 %/% 5,
  y = -(0:25 %% 5)
)

ggplot(shapes, aes(x,y,shape = factor(shape))) +
  geom_point(size = 4) +
  geom_point(size = 8) +
  scale_shape_manual(values = 0:25, 
                     guide = guide_legend(ncol = 3, keyheight = 1.8)) +
  theme_void() +
  coord_equal()

^{Created on 2023-09-24 with reprex v2.0.2}