1. Crash course in R – short introduction
Dag Hjermann & Susi Schneider, NIVA
Forfatternavn

2. Installing R Hopefully already done Otherwise:
cran.r-project.org
find ….
You may in addition install Rstudio
Nice window layout
Many practical features
Is also based on coding
Forfatternavn

3. R interface
Command window
Forfatternavn

4. Script window (can be saved as a file)
R interface
Command window
(cannot be saved)
Script window (can be saved as a file)
Forfatternavn

5. Running commands: 1 – in command window
Script window
Write commands Run using“Enter” button
If you make an error, use “up arrow” and correct it
Command window
Forfatternavn

6. Running commands: 2 – in script window
Write commands Push “Ctrl + R”
Command window
Forfatternavn

7. R vs. Excel: Opening a file
Forfatternavn

8. R vs. Excel: calculating new variable
Forfatternavn

9. Getting help in R
«?» method
Forfatternavn

10. Getting help in R
Google method

11. Packages R has built-in commands for simple statistics and graphs
Additional functions are in packages
Each package contains (usually) several functions (and often example data)
Ca packages can be found on cran.r-project.org
Each package only has to be installed once (are stored on your computer)
The packages you need must be loaded each time you start R
Forfatternavn

12. Installing libraries – common problem
R tries to install package in protected folder
«Do you want to use a personal library instead»
Say «no»
Solution
Make a new folder on C:, example C:/R
In R, write .libpaths(c("c:/R", .libPaths()))
This will make R installing new libraries in this folder
Forfatternavn

13. Introductions to R on internet
rforcats.net

14. Introductions to R on internet