Conclusion

Abstract

As we have seen, R differs from SAS and SPSS in many ways. R has a host of features that the other programs lack such as functions whose internal workings you can see and change, fully integrated macro and matrix capabilities, the most extensive selection of analytic methods available, and a level of flexibility that extends all the way to the core of the system. A detailed comparison of R with SAS and SPSS is contained in Appendix B.