Identifying required packages from code

Question

I want to follow the tutorial found on this site, but despite being thorough in all other aspects, the author has not included information on what packages need to be used for the code to function.

As far as I understand one of them will be the PerformanceAnalytics package, yet my inexperienced eye is not sure about what else I will need to include.

The fapply function used in the code is one example that I cannot find.

fapply()

Error: could not find function "fapply"

Answer 1

library(sos)
findFn("fapply", sortby = "Function")

Answer 2

The findFN(...) function is great. It should open an internet browser window with the search results by itself at least it does for me.