4.2区分度部分，d=D，m=M作何解啊，然后输入A点击enter键后，出现Don't know how to automatically pick scale for object of type function. Defaulting to continuous. Error in `f()`: ! Aesthetics must be valid data columns. Problematic aesthetic(s): d = D. Did you mistype the name of a data column or forget to add after_stat()? Run `rlang::last_error()` to see where the error occurred. 怎么解决啊，谢谢