Introduction to Data Science Data Analysis and Prediction Algorithms with R 1st Edition By Rafael Irizarry (Solution Manual)

,R Programming for Data Science
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RogergD.gPeng
Thisgbookgisgforgsalegatghttp://leanpub.com/

rprogramminggThisgversiongwasgpublishedgong2015-04-




13

ThisgisgagLeanpubgbook.gLeanpubgempowersgauthorsgandgpublishersgwithgthegLeangPublishinggpr
ocess.gLeangPublishinggisgthegactgofgpublishinggangin-
progressgebookgusingglightweightgtoolsgandgmanygiterationsgtoggetgreadergfeedback,gpivotguntilgy
oughavegthegrightgbookgandgbuildgtractiongoncegyougdo.

©2014g-g2015gRogergD.gPeng

,Contents

Preface.............................................................................................................................................1

HistorygandgOverviewgofgR...........................................................................................................4
WhatgisgR?...................................................................................................................................4
WhatgisgS?...................................................................................................................................4
ThegSgPhilosophy.........................................................................................................................5
BackgtogR....................................................................................................................................5
BasicgFeaturesgofgR.....................................................................................................................6
FreegSoftware..............................................................................................................................6
DesigngofgthegRgSystem..............................................................................................................7
LimitationsgofgR..........................................................................................................................8
RgResources.................................................................................................................................9

GettinggStartedgwithgR.................................................................................................................11
Installation.................................................................................................................................11
GettinggstartedgwithgthegRginterface..........................................................................................11

RgNutsgandgBolts..........................................................................................................................12
EnteringgInput...........................................................................................................................12
Evaluation..................................................................................................................................12
RgObjects...................................................................................................................................13
Numbers....................................................................................................................................13
Attributes...................................................................................................................................14
CreatinggVectors.......................................................................................................................14
MixinggObjects..........................................................................................................................15
ExplicitgCoercion.......................................................................................................................15
Matrices.....................................................................................................................................16
Lists...........................................................................................................................................17
Factors.......................................................................................................................................18
MissinggValues..........................................................................................................................19
DatagFrames..............................................................................................................................20
Names........................................................................................................................................21
Summary...................................................................................................................................22

, GettinggDatagIngandgOutgofgR....................................................................................................23
ReadinggandgWritinggData.........................................................................................................23
ReadinggDatagFilesgwithgread.table()....................................................................................................23
ReadinggingLargergDatasetsgwithgread.table..............................................................................24
CalculatinggMemorygRequirementsgforgRgObjects....................................................................25

UsinggTextualgandgBinarygFormatsgforgStoringgData................................................................27
Usinggdput()gandgdump().............................................................................................................................27
BinarygFormats..........................................................................................................................29

InterfacesgtogthegOutsidegWorld.................................................................................................31
FilegConnections........................................................................................................................31
ReadinggLinesgofgagTextgFile.....................................................................................................32
ReadinggFromgagURLgConnection..............................................................................................33

SubsettinggRgObjects....................................................................................................................35
SubsettinggagVector...................................................................................................................35
SubsettinggagMatrix...................................................................................................................36
SubsettinggLists.........................................................................................................................37
SubsettinggNestedgElementsgofgagList........................................................................................38
ExtractinggMultiplegElementsgofgagList.....................................................................................39
PartialgMatching........................................................................................................................39
RemovinggNAgValues................................................................................................................40

VectorizedgOperations..................................................................................................................42
VectorizedgMatrixgOperations....................................................................................................43

DatesgandgTimes...........................................................................................................................44
DatesgingR.................................................................................................................................44
TimesgingR.................................................................................................................................44
OperationsgongDatesgandgTimes................................................................................................46
Summary...................................................................................................................................47

ControlgStructures........................................................................................................................48
if-else................................................................................................................................................................ 48
forgLoops.................................................................................................................................50
Nestedgforgloops.......................................................................................................................52
whilegLoops.............................................................................................................................53
repeatgLoops...........................................................................................................................54
next,gbreak........................................................................................................................................................54
Summary...................................................................................................................................55

Functions.......................................................................................................................................56
FunctionsgingR...........................................................................................................................56
YourgFirstgFunction....................................................................................................................56