This page will feature slides from our sessions, exercises for you to complete, and their solutions (all to follow). Prior to the module, please install on an up-to-date version of R on the laptop you will use during the summer institute. R is free, and is available from this site.

To download and install Bioconductor to your laptop, first log on to the internet. Then open an R session and enter the following;

source("http://bioconductor.org/biocLite.R")
biocLite()

After doing this download, to download new Bioconductor packages (for example the hexbin package) use the following commands;

source("http://bioconductor.org/biocLite.R")
biocLite("hexbin")

Script files are posted following each session; these will contain our R code for the exercises. To make them work on your computer, remember to modify file names and locations appropriately. Also note that many different 'correct' solutions are possible.

Session 1, Introductions, overview of R (exercises) (R script file)

Session 2, Graphics in R (exercises) (R script file)

Session 3, More advanced graphics (R code for color wheels and boxes in the slides) (exercises) (R script file)

Session 4, Data manipulation (exercises) (R script file)

Session 5, Permutations tests (i.e. replication) (exercises) (R script file)

Session 6, Writing big loops (code for timing and speedup) (exercises) (R script file)

Session 7, Working with big data (exercises) (R script file)

Session 8, Bioconductor (exercises) (R script file)

For easier searching, here are all the slides in one document (PDF).

Before trying to read data into your R session, we recommend looking at it first, in a text editor. Is the data comma- or tab-delimited? Does it have a 'header' row containing variable names?

AMDchrom1snpStats.Rdata -- see session 8
annt.txt
bpdata.csv
data.vsn.csv
example-pheno.txt  
example-pheno.csv 
example-snp.txt
foursnps.csv
foursnps.txt
genepi.txt
justsnps.txt
niehs.csv
ribogreen.rda
salary.dat
SEAflights.db
SEAflightslocs.csv
sleep.csv
sampleinfo.csv
sisg.nc -- see session 7 (large file, 3M)
sisg.db (very large file, 40M)

• The R site, which includes the Comprehensive R Archive Network (CRAN) of downloads and packages
• Bioconductor is a collection of R packages for bioinformatics/genomics. It will be helpful to download and install the 'base' Bioconductor packages before sessions 8/9/10
• A reference card of common R commands (and a slightly longer reference card)
• To change languages, put a .Renviron file in the startup working directory - use en for English, or de, it (To get the working directory, use getwd())

• P. Dalgaard, Introductory Statistics with R: Springer, 2nd Edition 2008 [good if you haven't seen much statistics before, though it uses very simple methods, and doesn't emphasize programming much. There are several other texts at this level]
• Foulkes, Applied Statistical Genetics with R For Population-based Association Studies, 2009; this book covers a lot of the material we'll discuss in sessions 1-6. It introduces both statistical and genetic concepts, but places less emphasis on programming than this course.
• Matloff, The Art of R Programming, 2011; goes from introductory programming up to a high level.
• J. M. Chambers, Software for Data Analysis: Programming with R. New York: Springer, 2008. [for programmers; it begins with simple interactive use and gradually progresses to advanced use of R]
• Gentleman et al, Bioinformatics and Computational Biology Solutions Using R and Bioconductor: Springer 2005 [guides you through practical bioinformatics data analysis using the Bioconductor toolkit, emphasizing microarrays]
• Hahne et al, Bioconductor Case Studies; Springer 2008 [Several fairly advanced examples using R and Bioconductor, emphasizing genomic data]
• Braun and Murdoch, A First Course in Statistical Programming with R, CUP 2007 [A different emphasis from the other books here, good for those new to programming]