ggplot x-axis, y-axis ticks, labels, breaks and limits

General
4

If the graph limits don't already include the value of the "last tick", use the limits argument to ensure that the value is included. If the default breaks don't include a tick-mark at the desired value, then use the breaks argument to add a tick-mark at that value.

library(ggplot2)

d = data.frame(x=c(1.1, 1.9), y=c(1,2))

ggplot(d, aes(x,y)) + 
  geom_point()


ggplot(d, aes(x,y)) + 
  geom_point() +
  scale_x_continuous(limits=c(1,2))

Created on 2021-10-27 by the reprex package (v2.0.1)