Tag: grouping variable in dplyr

  • dplyr: Adding missing grouping variable

    dplyr: Adding missing grouping variable

    The dplyr message about adding missing grouping variable might appear during a data wrangling process. In my case, when I was using function select from dplyr, the “Adding missing grouping variable” message was displayed, and an unnecessary column appeared in the result. You cannot remove this column as easily as usual.