Remove groups that contain certain strings

Question

I have an issue about removing the groups that contain certain strings in its rows for example if includes .. I would like to achive this without breaking the p

Answer 1

Another option could be using %in% operator.

df %>% 
 filter(!(gr %in% unique(ifelse(grepl("\\.",vals),gr,NA) )))

#  vals gr
#1 good  1
#2  bad  1
#3 ugly  1