Extract data from a ggplot

Question

I have made a plot using ggplot2 geom_histogram from a data frame. See sample below and link to the ggplot histogram Need to label each geom_vline

Answer 1

If you need just data it seems layer_data is designed precisely for this :

layer_data(p, 1)

It will give you the data of the first layer, same as ggplot_build(p)$data[[1]].

Its source code is indeed precisely function (plot, i = 1L) ggplot_build(plot)$data[[i]]