Hello,
Right now I have the error message
Warning in Ops.factor(var_1, as.numeric(barwidth)) :
‘+’ not meaningful for factors
Warning: Removed 14 rows containing missing values (position_stack).
It's very difficult to use ggplot2 ( certainly I'm not expert with R code...)
Other point, I try to use the example code and it's not ok , the message is
Error in UseMethod("filter_") :
no applicable method for 'filter_' applied to an object of class "function"