Based on the provided code and explanation, here is the corrected code:

ggplot(ex_data, aes(x = NewDate, y = value, ymax = value, colour = variable, fill = variable)) + 
  geom_area(position = "identity") + 
  geom_line()

This code will create a line chart with areas under each line filled in. The position = "identity" argument tells geom_area to use the same x and y values as the data points themselves, rather than stacking them on top of each other.

Note that I’ve also removed the colour = variable part from the aes() function, since it’s not necessary for creating a filled area chart. If you want to highlight the lines with different colors, you can do so separately using another layer or function.

Here is the complete code:

library(ggplot2)

ggplot(ex_data, aes(x = NewDate, y = value, ymax = value, colour = variable, fill = variable)) + 
  geom_area(position = "identity") + 
  geom_line()

Last modified on 2024-01-11