2020-6-23Preface. This introduction to R is derived from an original set of notes describing the S and S-PLUS environments written in 19902 by Bill Venables and David M. Smith when at the University of Adelaide. We have made a number of small changes to reflect differences between the R and S programs, and expanded some of the material.
If you want to learn about our products , please call or write mail consultation.
We provide quality and efficient solutions to our global customers
We will get in touch with customers in time to understand the specific needs of customers, material composition, scheduled job site and other relevant information, to help customers analyze problems and solve problems.Read More