R help for Statistics/Forestry/Horticulture 571

R appendices to the course notes: here

• Link for the download of R: http://cran.us.r-project.org
• handout
• sloth data files: txt and csv.

R functions used in class

• Notes from the 'Import Data' demo: from lecture 1 and from lecture 2.
• Levene's test. Use: levene.test(sample1, sample2)
• adjusted degree of freedom. Use: df(s1, s2, n1, n2)

Below are various ressources to get help with R

• Introduction to R (by Brian Yandell) here
• R guides (developed for Statistics 371 by Bret Larget)
  • Introduction and installation of R pdf.
  • Basics of R, and how entering data pdf
  • Exploratory data analysis pdf
  • Probability distributions pdf
• R Reference card: Summary of useful functions.
• Resources for statistical computing with R, by UCLA's Academic Technology Service: here