Y axis won't start at 0 in ggplot

Question

In this plot I order the ylim to be 0, but the y axis seems to start at -1 anyway, which is very annoying. I really like the y axis to stat at 0. Solutions?

Answer 1

p + scale_y_continuous(
  limits =   c(0,max_num),
  expand = expansion(mult = c(0,0.05))
)

this function ( expansion(mult = c(0,0.05))) may help