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R: Installation

R: Installation. 林 建 甫 C.F. Jeff Lin, PhD. 台 北 大 學 統 計 系 助 理 教 授 台 北 榮 民 總 醫 院 生 物 統 計 顧 問 美 國 密 西 根 大 學 生 物 統 計 博 士. What is R ?. Statistics package (a GNU project based on the S language) Statistical environment Graphics package Programming language. Let’s look at R.

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R: Installation

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  1. R: Installation 林 建 甫 C.F. Jeff Lin, PhD. 台 北 大 學 統 計 系 助 理 教 授 台 北 榮 民 總 醫 院 生 物 統 計 顧 問 美 國 密 西 根 大 學 生 物 統 計 博 士 Jeff Lin, MD. PhD.

  2. What is R ? • Statistics package (a GNU project based on the S language) • Statistical environment • Graphics package • Programming language Jeff Lin, MD. PhD.

  3. Let’s look at R Jeff Lin, MD. PhD.

  4. Installing R • www.r-project.org/ • download from CRAN • select a download site • download the base package at a minimum • download contributed packages as needed • Current Version: R-2.3.1 (2006-06-01) Jeff Lin, MD. PhD.

  5. http://http://cran.r-project.org/ Jeff Lin, MD. PhD.

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  11. R-2.3.1-win32.exe Jeff Lin, MD. PhD.

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  13. R-2.3.1-win32.exe Jeff Lin, MD. PhD.

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  18. 安裝的檔案夾位置 Jeff Lin, MD. PhD.

  19. 安裝的內容, 空間許可下, 全選 Jeff Lin, MD. PhD.

  20. 建立開始功能表單 Jeff Lin, MD. PhD.

  21. 建立捷徑與快述啟動 Jeff Lin, MD. PhD.

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  25. Installing R on Windows Jeff Lin, MD. PhD.

  26. Starting and Quitting R • click on the R icon • q() Jeff Lin, MD. PhD.

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  30. Getting Help • Getting help > help ( ) # provides help on how to use ‘help’ > help (topic) # provides help on a specific topic > help.start ( ) # brings you to a web interface to the # R documentation Jeff Lin, MD. PhD.

  31. Getting Help Jeff Lin, MD. PhD.

  32. Useful R Function > q() #quit R > help.start() # html help > help # help(lm) get “plot” function detail > ?lm # get “lm” function detail > help.search("linear model") > ls # list objects > rm # rm(xyz) remove “xyz” object Jeff Lin, MD. PhD.

  33. Browse the help > help.start() Jeff Lin, MD. PhD.

  34. > help(lm) > ?lm • Getting help on a specific function Jeff Lin, MD. PhD.

  35. Searching for help > help.search(“linear model”) Jeff Lin, MD. PhD.

  36. Useful R Function > example # Run the example from the help page for an object > data # List the available data sets or import a data set > library # List available packages or attach a package > objects # List the objects in the workspace Jeff Lin, MD. PhD.

  37. Change Working Directory # Create a folder in C:\temp\Rdata first > setwd("C://temp//Rdata") # set new working directory #Create a folder in C:\temp\Rdata\Biost first > setwd("C://temp//Rdata//Biost") #Create a folder in C:\temp\Rdata\Reg first > setwd("C://temp//Rdata//Reg") Jeff Lin, MD. PhD.

  38. Help help ( ) is an R function help.start( ) R functions take arguments (pieces of information that you put into the function which go in between brackets and are separated by commas) and can perform a range of tasks. In the case of the ‘help’ function the task is to display information from the R documentation files. Jeff Lin, MD. PhD.

  39. Online Helps • R FAQ • Mailing Lists (listserv) • Online r-help Jeff Lin, MD. PhD.

  40. r-help Mailing List • Sign up on http://www.r-project.org/ • Think of before sending a question • Read the help/docs first • Add a code example • What version of R Jeff Lin, MD. PhD.

  41. Office Documents Jeff Lin, MD. PhD.

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  43. Contributed Online Documents Jeff Lin, MD. PhD.

  44. Reference Books Jeff Lin, MD. PhD.

  45. Questions?! Jeff Lin, MD. PhD.

  46. What is R? • R系統是由 Ross Ihaka與 Robert Gentleman從 S語言所發展出來, 主要是為了統計分析與繪圖. • S語言早在 1980年代末期, 由 AT&T實驗室,Rick Becker, John Chambers,與 Allan Wilks發展用來進行統計分析與作圖. • Insightful公司將S商品化, 並加入許多方便的操作介面, 稱為 Splus. • R可視為統計數學軟體, 也是一種程式語言. Jeff Lin, MD. PhD.

  47. What is R? • R與 Splus語法大多相近, • 但是 R是一個免費 (open-source, GNU General Public License)的統計分析軟體, 目前由一群跨國際的志工人員組成的 R核心發展組織 (R core-development team)所維持, 運作與持續更新發展. • R 計畫的網址在 http://www.r-project.org在這網址上可獲的更多有關 R的資訊. • R與 S都是以物件導向為主的程式語言, 透過交互作用方式很容易地進行統計分析與繪圖, • 這與 SAS, SPSS的方式有所不同. Jeff Lin, MD. PhD.

  48. What is R? • R is object oriented • Includes many statistical tools • Can be used to share/reproduce analyses • Many new packages being created - can be downloaded and installed easily • Largely text-based interface • Note 1: > is the prompt • Note 2: R is CASE sensitive!! Jeff Lin, MD. PhD.

  49. What is R ? • NOT a statistics software package • NOT menu-driven ? • NOT quick to learn ? Jeff Lin, MD. PhD.

  50. Why R? • R was written by scientists to be used by scientists. • Runs on Windows, Mac, Unix, Linux, ... • Easy to install. • R is free. • Hundreds(!) of packages available. • Papers are often published with a R package. Jeff Lin, MD. PhD.

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