I can make a stacked bar plot just fine.
Reprex:
ggplot(filter(mpg, cyl == 4 | cyl ==6)) +
geom_bar(aes(x = class, fill = factor(cyl)), alpha = .3)
However, I would like for the the bars to be on top of each other, so you would see the colors mix, minivan for example should stay at a count of 10.
The bars also don't have to be completely on top of each other, bud def. not completely side to side, at least half or more.