I am using dplyr package and want to group datafarame by column in class character. This give me "Error in UseMethod("group_by_") : no applicable method for 'group_by_' applied to an object of class "character"".
abc1<- group_by(frazy_i_lp_new_Full$lp)%>%summarise(wysz = sum(`ilośc wyszukań`))
How can I group columns in dataframe grouped by column containing characters?