Programming in r
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Programming in R. Harry R Erwin, PhD CIS308 Faculty of Applied Sciences University of Sunderland. Resources. The Website has links to three programming tutorials. http://zoonek2.free.fr/UNIX/48_R/02.html is accessible.

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Programming in R

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Programming in r

Programming in R

Harry R Erwin, PhD

CIS308

Faculty of Applied Sciences

University of Sunderland


Resources

Resources

  • The Website has links to three programming tutorials.

    • http://zoonek2.free.fr/UNIX/48_R/02.html is accessible.

    • http://cran.r-project.org/doc/manuals/R-intro.html provides examples to work through.

    • Lumley’s course http://faculty.washington.edu/tlumley/Rcourse/ is also good.

  • Work through the tutorial you find easiest.


What is r

What is R?

  • Statisticians use R to analyze data stored in objects that look like spreadsheets—data frames. You can think of R as spreadsheet scripting on steroids.

  • R is a functional language like Lisp, Python, or OCaML. (See http://en.wikipedia.org/wiki/Functional_programming.)

  • Specifically, functions in functional languages lack side-effects.

  • Eternal Flame by Bob Kanefsky and sung by Julia Ecklar (about Lisp, another functional language):


Learning r

Learning R

  • Start R

  • We will work through some examples of R code from chapters 1 and 6 and Appendix E of Verzani’sUsing R for Introductory Statistics.

  • Afterwards, we’ll dip into the Zoonek programming tutorial (the second one). It has a bit more depth.


Use a notes file

Use a Notes File

  • Open a new document and type the following into it:

    • # Notes

    • mean(rnorm(10))

    • # To execute a selection in Windows, select it and type ctrl-R.

    • # In Mac OS, do the same, but type cmd-return instead.

    • # To source the entire edit file, use ctrl-E or cmd-E.

    • # The Windows FAQ is here: http://cran.r-project.org/bin/windows/base/rw-FAQ.html

  • Try ctrl-R on the contents and look at your command window.

  • I will now demonstrate a number of features of R. Take good notes!


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