Have you ever mixed up dplyr’s pipe operator or magittr %>% with ggplot’s “+” while piping dplyr commands with ggplot2, you are not alone. Depending on where you misused “%>%” for “+”, you might get confusing errors like Error: Mapping must be created by `aes()` or `aes_()` Error in as.vector(x, “character”) : cannot coerce type… Continue reading Why can’t ggplot2 use %>% instead of “+”?