When I try to add vertical lines to subplots, the lines only apply to the first subplot. Is there a way to add vertical lines to each subplot? Here is a MWE:
using DataFrames,StatsPlots
df = DataFrame(g=rand(1:3,100),y=randn(100))
@df df histogram(:y,group=:g,layout=(3,1))
vline!([0,0,0],layout=(3,1))