How to make dodge in geom_bar agree with dodge in geom_errorbar, geom_point

Question

I have a dataset where measurements are made for different groups at different days.

I want to have side by side bars representing the measurements at the different

Answer 1

sometimes you put aes(x=tasks,y=val,fill=group) in geom_bar rather than ggplot. This causes the problem since ggplot looking forward x and you specify it by the location of each group.