Adding vertical line in plot ggplot

Question

I am plotting a graph using the following piece of code:

library (ggplot2)

png (filename = \"graph.png\")
stats <- read.table(\"processed-r.dat\", header         


        

Answer 1

You can add vertical line with geom_vline(). In your case:

+ geom_vline(xintercept=2)

If you want to see also number 0.5 on your y axis, add scale_y_continuous() and set limits= and breaks=

+ scale_y_continuous(breaks=c(0.5,1,2,3,4,5),limits=c(0.5,6))