a very short introduction to r pia wohland. r is… -a statistical software -programming language...
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A very shortintroduction to R
Pia Wohland
R is…
-A statistical software-Programming language-Free!-Very good in handling and manipulating data sets
-very comprehensive, easy to learn
-large community, with many contributors-well supported mailing list-additinal packages written by users
-Works with command linebut some graphical user interfaces (GUI) available: R-Commander, Rpad, SciViews-R
•Info on R http://www.r-project.org/•Download software http://cran.r-project.org/
http://addictedtor.free.fr/graphiques/Graphics White British White Irish Other White W & B Caribbean
W & B African White and Asian Other Mixed Indian
Pakistani Bangladeshi Other Asian Black Caribbean
Black African Black Other Chinese Other Ethnic Group
Maps
Create your own functionsSee an example in the Practical this afternoon!
Statistics
Manage your data
R under windows
> Command prompt
You can type your commands directly at the command prompt (>) or you can use theEditor window. The advantage of the editor is, you can save your script straight away.
> help() # opens help > help.start() # opens R-Documentation in a browser window> help(command) # shows help on “command”> ?command # shows help on “command”> library() # Shows which packages are loaded?> library(help="graphics") # Shows help for package “graphics”
For example> ?plot
Help youRself....
Package the command belongs to
How to useWhat arguments, and their default settings
Always examples at the bottom
Links to related subject
Essentials:R is case sensitive!
(beware auto correction)
Decimal separator `.´ not`,´Character strings are placed in “ “Where are my data?To find out in which directory R is working: getwd()To change the directory: setwd(“pathname”)Caution:setwd(“C:\\SummerSchoolPracticals“)setwd(“C:/SummerSchoolPracticals“)When importing your own data: best no spaces in header.
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