Introductory Slides for R - Statistics

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Naming Conventions in RR is case sensitive. Object names (data or functions) should only containalpha-numeric characters (A-Z, a-z, 0-9), a period or an underscore.Such names cannot start with a digit or an underscore.Object names can start with a period, but they are hidden when you type ls().To see them type ls(all.names=T).You should avoid using object names that are already used by R, such ast, c, q, T, F, ls, pt, mean, var, pi, etc.. Use descriptive names.Any object that you create using such system names could mask the built-in Robject. For example, pi
Basic Usage of RWe can use R as an oversized scientific calculator.> 5+6*3[1] 23> exp(log(10))[1] 10> pi[1] 3.141593> sin(pi)[1] 1.224606e-16 # practically zero> sin(2)ˆ2+cos(2)ˆ2 # text after # is treated as a comment[1] 1 # and is not executed> 1/Inf[1] 0> Inf # Inf stands <strong>for</strong> infinity[1] Inf # and operations with it will yield sensible results> exp(-Inf)[1] 0> exp(Inf)[1] Inf10
Page 1 and 2: STAT 311Elements of Statistical Met
Page 3 and 4: Statistical Analysis PlatformFreely
Page 5 and 6: Workspaces and DirectoriesBy defaul
Page 7 and 8: Help in RIf you know the name of a
Page 9: Median ValueDescriptionCompute the
Page 13 and 14: Functions Creating Vectors> 1:10[1]
Page 15 and 16: Data ModesWe saw that vectors can b
Page 17 and 18: Mode CoercionMixed mode elements in
Page 19 and 20: Matrices> mat mat # vertically pos
Page 21 and 22: Submatrices of Matrices> mat[1:3,1:
Page 23 and 24: Matrices via rbind> rmat rmat[,1]
Page 25 and 26: Custom FunctionsR can be extended b
Page 27 and 28: Another Way to Construct FunctionsW
Page 29 and 30: Using the NotePad or WordPad Editor
Page 31 and 32: Saving Objects outside the R Worksp
Page 33 and 34: Getting Data into R from ExcelGetti
Page 35 and 36: ListsLists allow more general forms
Page 37 and 38: Lists with Named Objects> b.list b
Page 39 and 40: Programming Control Tools: for loop
Page 41 and 42: Graphics in RSome people use R just
Page 43 and 44: Simple Command Line Graphics> hist(
Page 45 and 46: Text Annotated Graphicshist.rainier
Page 47 and 48: Math Annotated Graphicsplot.fun
Page 49 and 50: PackagesAside from your own extensi

Introductory Slides for R - Statistics

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