An Introduction to R.doc

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1、TableofContentsPreface.............................................................11Introductionandpreliminaries...............................21.1TheRenvironment................................................................21.2Relatedsoftwareanddocumentation...............................

2、................21.3Randstatistics....................................................................21.4Randthewindowsystem.........................................................31.5UsingRinteractively..............................................................31.6Anintroductorysession.

3、...........................................................41.7Gettinghelpwithfunctionsandfeatures...........................................41.8Rcommands,casesensitivity,etc..................................................41.9Recallandcorrectionofpreviouscommands............................

4、...........51.10Executingcommandsfromordivertingoutputtoafile............................51.11Datapermanencyandremovingobjects...........................................52Simplemanipulations;numbersandvectors.................72.1Vectorsandassignment............................................

5、................72.2Vectorarithmetic..................................................................72.3Generatingregularsequences......................................................82.4Logicalvectors....................................................................92.5Missingvalues....

6、.................................................................92.6Charactervectors................................................................102.7Indexvectors;selectingandmodifyingsubsetsofadataset.......................102.8Othertypesofobjects.........................................

7、...................113Objects,theirmodesandattributes........................133.1Intrinsicattributes:modeandlength.............................................133.2Changingthelengthofanobject.................................................1