Installing R-Studio on Windows 7 / Mac OS 10.6 (+) • 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

Then download & install RStudio First download & install the R base package 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)

Command-line window Memory window: list of objects Currently in the memory for use Multi-function Window (for file browsing, plotting, Software package management …

ATM 315 Environmental Statistics Course 2014-01-23 3

Menu list for the R-Studio: (1) Set your work path for the Session (and current sessions)

Your files in the directory 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

  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

   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) s ource(“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") s ource(“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  example001.R

8

Our first R-session: data types and objects  example001.R

example001.R

9

Our first R-session: data types and objects  example001.R

10

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 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)] 12

Our first R-session

script: hadcrut4.R

13

Our first R-session: Global mean temp.

 example001.R

hadcrut4.R

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NOTES

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