Error message content: Error details

1. Describe exact error with x =.

• x = “Location 100 doesn’t exist.”
• x = “Result 1 is a character vector.”
• If uncertain, list issues with "*" =
  • c(“*” = “Size 2: Existing data.”, “*” = “Size 3: Column y.”)

2. Give contextual info with “i =”.

• i = “There are only 26 elements.”
• i = “Only values of size one are recycled.”

3. If source of error is clear & common, provide a hint with i = ... ?

• i = “Did you mean Species == \"setosa\"?”
• i = “Did you use %>% instead of +?”