could you tell me how to order stacked charts from top to down by sales in 2020? For instance, in 2020 sales were the highest in the 9nth category, so I want to be in this category at the top and so on. In addition, I need to round up years (2012.5 to 2012) I set them as Integer but does not work. used code:
ggplot(data, aes(x=Year, y=Sale, fill=group)) +
geom_area()