https://www.coursehero.com/file/44150993/Thera-Bank-Solutiontxt/#/doc/qa

I have been trying to run a specific code from the solution provided in the above link in R, however the error message returns was "'+'is not meaningful for factors", why is it so ?

How can I avoid such a situation in writing my own code to answer similar questions.

The code I have been trying to run is this :

cust_base_final<-cust_base_final %>%

mutate(have_multiple_relns=if_else(have_securities_acct+have_CC+have_deposit_account>1,1,0))

Thanks