Instant R Starter, the missing piece

Instant R Starter from is a book that I wish was available awhile ago. The book has information that I had to dig for when I needed it. Special values (NA, NaN, INF) NA is missing number. NaN not a number. And how they are used in R.

Clear directions on working with vectors. How vectors can be used as arguments of functions.

A clear concise book that is the missing piece.  It covers R programming with code and examples of loops and how to make your own functions. The missing piece in my library of R books.