Special thanks to Division of Biostatistics and Bioinformatics, National Health Research Institutes, Taiwan, they offered me a chance as part of my military service, and provided an environment to try and write a lot of different applications. Although some ideas were not mature enough in this period, I tried to write down every key points according to my programming experience.

Any topic which I interest in and is not completed will be listed in the secion of "Not end". Please tell me any incorrect usages in this note.

About R's version
R version 1.6 for MS windows was used to write this note. Most examples can also run for version 1.5 to 2.4. Without any claim, all codes used in examples were presumed to be coded in R version 1.6 and Linux System.

About the readers
Who are interesting in this note? Where are they from? A record from google analytics shows the possible visists

About the author
Wei-Chen Chen (snoweye at iastate.edu) is a Ph.D. student, enrolling in Department of Statisitcs, Iowa State University, Ames, Iowa, USA, majors in Statistics with graduation undetermined, and mentoring by Dr. Karin S. Dorman.

About the copyright
Please tell me any place where should be cited and it's original in this note. In case the original page loses, I have made a mirror for each on-line documents or packages, and the source links and the mirrors will be provided simultaneously. Please tell me any mirror where violates your copyright in this note. It must be removed immediately.