Joe Kunkel, UMass Amherst, Biology
joe@bio.umass.edu What is critical to know about R?

How to install from Cran: [http://cran.r-project.org/ http://cran.r-project.org/]

• Gnu-Public (free)
• Commercial (Why? multi thread, multi-processor use, large data files, ...)
  • Nie SPSS author on R
• http://www.bio.umass.edu/biology/kunkel/pub/r_scripts/
• https://bcrc.bio.umass.edu/phpwiki/index.php/BiometryProject

Base library operations and functions

• help, help.search, ?, ??
• Math operations
  • + - * / ^ ... basic math
  • %*% ... matrix algebra
  • %% and %/% ... special operations
  • %/% ... integer division
  • %% remainder
• functions of form foo(par1, par2, ...)
• Help documents from the R-browser (pull down menu). < UL>
• An Introduction to R
• R Installation and Administration
• Read and Write functions (input and output).
• *CSV, tables, text, numeric, headers, skipping lines, picking lines.
• *Binary files, proprietary files, image files (greyscale, color)

Conditional Expressions Important add-on libraries

• Ape
• pixmap
• fields
• lattice

WIN MAC incompatibilities
if (!"unix"==.Platform[1])
{quartz<-function() windows()}


Exemplar Projects

• Raman Spectroscopy.
• *Baseline correction
• *Raw data input
• *Function deffinition
• Fields library plots.

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