Screen Link:
https://app.dataquest.io/m/323/data-cleaning-with-r/12/confirm-that-data-frames-are-prepared-for-joining
My Code:
ny_schools<- list(sat_results, ap_2010, class_size, demographics, graduation, hs_directory)
names(ny_schools)<-c("sat_results", "ap_2010", "class_size", "demographics", "graduation", "hs_directory")
duplicate_DBN<- ny_schools%>% map(mutate, is_dup=duplicated(DBN))%>% map(filter, is_dup=="TRUE")
What I expected to happen:
My answer is the same as the model, but it failed.
What actually happened:
