Installing R-Studio on Windows 7 / Mac OS 10.6 (+)
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Goto http://www.rstudio.com/
Follow the link and then choose the desktop application
Download the R base package (see also next page) & R-Studio
Follow the instructions of the Installer
First download & install
the R base package
Then download & install
RStudio
Follow the link
ATM 315 Environmental Statistics Course
2014-01-23
1
Installing R from the CRAN project pages
www.cran.us.r-project.org
ATM 315 Environmental Statistics Course
2014-01-23
2
A first session with R-Studio (Windows 7)
Memory window: list of objects
Currently in the memory for use
Multi-function Window
Command-line window
ATM 315 Environmental Statistics Course
(for file browsing, plotting,
Software package management …
2014-01-23
3
A first session with R-Studio (Windows
7) window
Command-line
Your files in the directory
Menu list for the R-Studio:
(1) Set your work path for the
Session (and current sessions)
I suggest for this course:
Create your atm315course directory
with 3 sub-directories:
(1) scripts
(2) data
(3) figures
R-scripts (programs) are plain text files with
ending .R
( NOT formatted Word documents)
ATM 315 Environmental Statistics Course
2014-01-23
4
Our first R-session
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We first set the working directory for the session (in menu ‘session’, choose ‘set
working directory’)
Or type into the command line window ( in windows it will start with C:/Users),
MAC it will start with /Users/)
setwd("C:/Users/oe524132/WORK/111TEACHING/R-course")
Your working directory should have three subdirectories:
Subdirectory ‘scripts’
Subdirectory ‘data’
Collection of datasets
(input data and output
data)
Contains the scripts.
Scripts are text files
ending ‘.R’
They contain program
codes that can be
executed
Subdirectory ‘figures’
We will collect our
plots in this directory
5
Our first R-session
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With Windows File Browser tool / Mac Finder go into any directory of your choice
Create a new folder (named e.g. “R-Course”). Then enter the folder and
Create 3 new folders in there: “scripts” , “data”, “figures”
NEXT start R-Studio and
set the working directory for the session
(in menu ‘session’, choose ‘set working directory’)
Or type into the command line window
(in windows it will start with C:/Users),
MAC it will start with /Users/)
In my case the directory path in set setwd("C:/Users/oe524132/WORK/111TEACHING/R-course")
(your path name will differ of course on your system)
source(“scripts/hadcrut4.R”)
NOTE: R commands and scripts are case sensitve (i.e. the function call
“Source(“scripts/hadcrut4.R)” doesn’t work!
6
Our first R-session


We first set the working directory for the session (in menu ‘session’, choose ‘set
working directory’)
Or type into the command line window ( in windows it will start with C:/Users),
MAC it will start with /Users/)
setwd("C:/Users/oe524132/WORK/111TEACHING/R-course")
source(“scripts/hadcrut4.R”)
NOTE: R commands and scripts are case sensitve (i.e. the function call
“Source(“scripts/hadcrut4.R)” doesn’t work!
7
Our first R-session: data types and objects
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example001.R
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Our first R-session: data types and objects
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example001.R
example001.R
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Our first R-session: data types and objects
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example001.R
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Our first R-session: data types and objects

example001.R
11
Our first R-session
HADCRUT4 global annual mean
temperature anomalies
Global warming stalled?
 Global warming trend
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A good habit: give reference /credit to
the data source and date of retrieval.
Acknowledge the developers of the
data sources:
Morice, C. P., J. J. Kennedy, N. A. Rayner, and P. D. Jones (2012),
J. Geophys. Res., 117, D08101, doi:10.1029/2011JD017187.
Data retrieved from http://www.metoffice.gov.uk/hadobs/hadcrut4/data/current/download.html
2014-01-20,
[Version HadCRUT.4.2.0.0 (file HadCRUT.4.2.0.0.annual_ns_avg.txt)]
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Our first R-session
script: hadcrut4.R
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Our first R-session: Global mean temp.
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example001.R
hadcrut4.R
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NOTES
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