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1、BadDataHandbookQ.EthanMcCallumBadDataHandbookbyQ.EthanMcCallumCopyright?2013Q.McCallum.Allrightsreserved.PrintedintheUnitedStatesofAmerica.PublishedbyO’ReillyMedia,Inc.,1005GravensteinHighwayNorth,Sebastopol,CA95472.O’Reillybooksmaybepurchasedforeducational,business,
2、orsalespromotionaluse.Onlineeditionsarealsoavailableformosttitles(http://my.safaribooksonline.com).Formoreinformation,contactourcorporate/institutionalsalesdepartment:800-998-9938orcorporate@oreilly.com.Editors:MikeLoukidesandMeghanBlanchetteProofreader:MelanieYarbro
3、ughProductionEditor:MelanieYarbroughIndexer:AngelaHowardCopyeditor:GillianMcGarveyCoverDesigner:KarenMontgomeryInteriorDesigner:DavidFutatoIllustrator:RobertRomanoNovember2012:FirstEditionRevisionHistoryfortheFirstEdition:2012-11-05FirstreleaseSeehttp://oreilly.com/c
4、atalog/errata.csp?isbn=9781449321888forreleasedetails.NutshellHandbook,theNutshellHandbooklogo,andtheO’ReillylogoareregisteredtrademarksofO’ReillyMedia,Inc.BadDataHandbook,thecoverimageofashort-leggedgoose,andrelatedtradedressaretrade‐marksofO’ReillyMedia,Inc.Manyoft
5、hedesignationsusedbymanufacturersandsellerstodistinguishtheirproductsareclaimedastrademarks.Wherethosedesignationsappearinthisbook,andO’ReillyMedia,Inc.,wasawareofatrade‐markclaim,thedesignationshavebeenprintedincapsorinitialcaps.Whileeveryprecautionhasbeentakeninthe
6、preparationofthisbook,thepublisherandauthorsassumenoresponsibilityforerrorsoromissions,orfordamagesresultingfromtheuseoftheinformationcontainedherein.ISBN:978-1-449-32188-8[LSI]TableofContentsAbouttheAuthors............................................................
7、..ixPreface......................................................................xiii1.SettingthePace:WhatIsBadData?............................................12.IsItJustMe,orDoesThisDataSmellFunny?.....................................5UnderstandtheDataStructure6Fie
8、ldValidation9ValueValidation10PhysicalInterpretationofSimpleStatistics11Visualization12KeywordPPCExample14SearchReferralExample19Re
