I have to use this function:
test = as.data.frame (left_join (registerPers, pers, by = c ("RB030", "PB030")))
but Rstudio keeps giving me this error:
Error in left_join (registerPers, pers, by = c ("RB030", "PB030")):
could not find function "left_join"
R does not install the dplyr package for me, not even putting the "dependence = TRUE" option.
What should I do? pls help