I want to plot part of geom_vline or geom_hline,codes as follows:
df <- data.frame(x=1:10,y=1:10)
plt <- ggplot(data=df)+
geom_point(aes(x=x,y=y))+
geom_vline(aes(xintercept=x[2]))+
geom_hline(aes(yintercept=y[2]))
I expect to display the left and lower part line as the cross point.
but there is no argument such as xlim or ylim in geom_vline
You can use geom_line.
library(ggplot2)
df <- data.frame(x=1:10,y=1:10)
plt <- ggplot(data=df)+
geom_point(aes(x = x, y = y))+
geom_line(data = data.frame(x = c(2, Inf), y = c(2, 2)), aes(x = x , y = y)) +
geom_line(data = data.frame(x = c(2, 2), y = c(2, Inf)), aes(x = x, y = y))
Or geom_segment. They resulted in the same plot.
plt <- ggplot(data=df)+
geom_point(aes(x = x, y = y))+
geom_segment(aes(x = 2 , y = 2, xend = Inf, yend = 2)) +
geom_segment(aes(x = 2 , y = 2, xend = 2, yend = Inf))
