I am working through the code in Big Data Analytics with R chapter 3 published by Pakt and have come across a series of errors telling me that various functions that end in .ffdf are not found. I have the ff and ffbase packages installed and libraried. I can see the functions in the list in the packages window but when I run the code -> not found.
I am running R version 1.4.1103 on macOS Big Sur 11.2.1
#Chapter 3 lines 76 - 78
#first two lines succeed but third fails can't find function
#Chapter 3 line 106