websites
Official R website: http://www.r-project.org/
Web searches for R related content: http://www.rseek.org/
Quick R: http://www.statmethods.net/
R-bloggers: http://www.r-bloggers.com/
Web searches for R related content: http://www.rseek.org/
Quick R: http://www.statmethods.net/
R-bloggers: http://www.r-bloggers.com/
Other courses ON-LINE
Swirl: Learn R in R
Hadley Wickham's Introduction to Data Analysis
Hadley Wickham's Advanced R
Coursera: R Programming
Coursera: R Introducción a la programación estadística con R
Coding club: here
Code school: TryR
Data camp: Introduction to R
Hadley Wickham's Introduction to Data Analysis
Hadley Wickham's Advanced R
Coursera: R Programming
Coursera: R Introducción a la programación estadística con R
Coding club: here
Code school: TryR
Data camp: Introduction to R
quick references
R basics workshop cheat sheet: download
List of point symbols and line types: download
List of colors in R: download
Quick reference: download
Reference index: download
List of point symbols and line types: download
List of colors in R: download
Quick reference: download
Reference index: download
quick How to's
Format R code: link
Open excel files directly: link 1; link 2
Principal Component Analysis: link 1; link 2
Open excel files directly: link 1; link 2
Principal Component Analysis: link 1; link 2