Is there a way to dynamically shade a region of the geom_bar based on a secondary value?
In the simple example below, I have a limit which is used to create the line on the chart. I would want any portion of the bars above the line to be either lighter/darker than below the line or have a pattern overlay but remain the same colors. However, the number of groups and size of groups making up the bars are dynamic and will change from bar to bar and plot to plot so I was hoping there was a way to do it without calculating on each bar where the line intersects. Thank you!
x <- tribble( ~n, ~a, ~b, ~c, ~d, ~cut, 1, 5, 5, 5, 5, 12, 2, 10, 4, 1, 2, 12, 3, 11, 0, 0, 14, 12, 4, 5, 7, 5, 0, 12 ) x <- x %>% gather(a:d, key = label, value = val) ggplot(a) + geom_col(aes(n, val, fill=label)) + geom_line(aes(n, cut)) + theme_bw()