[R] Limit the y-axis line with ggplot2 (not the axis itself, but the line used at the left of the graph)

Marc Girondot marc_grt at yahoo.fr
Mon Oct 24 13:08:32 CEST 2016

Hello everybody,

Using ggplot2 package, is there a way to force to stop the y-axis line 
at a specified point ? (not using ylim because I want that some text 
written using annotate() at the top of the graph is still shown).

Bellow is a simple example to show what I would like do:

Thanks a lot



g <- ggplot()+
   geom_point(aes(x=c(20, 29, 32), y=c(0, 0.4, 1)))+
   scale_y_continuous(breaks=c(0, 0.25, 0.5, 0.75, 1))+
   labs(x="Label for x axis")+
   labs(y="Label for y axis") +
   annotate("text", x = 25 , y=1.2, label="Text 1")+
   annotate("text", x = 22 , y=1.0, label="How to stop the y-axis line 
here !")+
   geom_segment(aes(x=25, xend=25, y=0, yend=1.1), linetype=2)+
   # This part is just to make it more nice
   theme(panel.background = element_rect(fill = 'white'),
         panel.grid.major = element_blank(),
         panel.grid.minor = element_blank(),
         plot.margin = unit(c(0.5, 1, 0.5, 0.5), "cm"),
         panel.border = element_blank(),
         axis.line.x = element_line(),
         axis.line.y = element_line())

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