REFERENCES
- Becker , R. A. 1989 . “Writing a Graphics Device Function for S,” Murrary Hill , NJ : AT&T Bell Laboratories. . Technical Report 70
- Becker , R. A. and Chambers , J. M. S. 1984 . An Interactive Environment for Data Analysis and Graphics Belmont , CA : Wadsworth. .
- Becker , R. A. and Chambers , J. M. 1985 . Extending the S System Monterey , CA : Wadsworth. .