CODEWITHSUNDEEP
rggplot2
Adela
Adela

Reputation: 1797

Lines with geom_segment does not reach the axis limit

I'm trying to plot several lines using ggplot2 and functions geom_hline and geom_segment. The problem is that with geom_segment it is not possible to reach axis limit. This is not the problem with geom_hline but then the plot seems a little bit inconsistent. I also tried to change axis limits but without any success.

Example: 

ggplot() + 
  geom_hline(yintercept = 3) + 
  geom_segment(aes(x = 2, xend = 4, y = 2.75, yend = 2.75)) +
  geom_segment(aes(x = 3, xend = 5, y = 3.75, yend = 3.75)) + 
  # xlim(c(2, 5)) # no change
  # xlim(c(2.5, 4.5)) # warning + no geom_segment lines plotted

Upvotes: 0

Views: 1960

Answers (1)

Richard Telford
Richard Telford

Reputation: 9923

You need to set the expand argument to zero to turn off padding

ggplot() + 
  geom_hline(yintercept = 3) + 
  geom_segment(aes(x = 2, xend = 4, y = 2.75, yend = 2.75)) +
  geom_segment(aes(x = 3, xend = 5, y = 3.75, yend = 3.75)) + 
  scale_x_continuous(expand = c(0,0))

Upvotes: 2

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