Label Coordinates in ggplot 2 in R [closed]

Question

I have drawn a cumulative distribution graph in R. I want to label the points on the graph when the Y-axis (Cumulative probability) has 0.1, 0.2, 0.3...etc (some specific Y values) with both X and Y coordinates. For example, I want to mark the point (1250,0.5) in the graph and labelthat value in the graph. I would appreciate it if you could help me.

Answer 1

You need to add points using a separate geom_point function.

library(tidyverse)
theme_set(theme_minimal())

# Loading data
iris = as_tibble(iris)

Now I filter points that I want to highlight.

# filter out points to highlight (say which have sepal.length 5, 4.4 or 4.9)
iris_highlight = iris %>% 
   filter(Sepal.Length %in% c(5.0, 4.4, 4.9))

Now comes the meat.

# Plot
iris %>%
   ggplot(aes(x = Sepal.Width, Sepal.Length)) +
   geom_point(alpha = 0.3) +
   geom_point(data = iris_highlight, 
              aes(x = Sepal.Width, y = Sepal.Length, colour = "red"))