[Bad.Data.Handbook(2012.11)].Q.Ethan.McCallum.文字版

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1、BadDataHandbookQ.EthanMcCallumBadDataHandbookbyQ.EthanMcCallumCopyright©2013Q.McCallum.Allrightsreserved.PrintedintheUnitedStatesofAmerica.PublishedbyO’ReillyMedia,Inc.,1005GravensteinHighwayNorth,Sebastopol,CA95472.O’Reillybooksmaybepurchasedforeducational,business,orsa

2、lespromotionaluse.Onlineeditionsarealsoavailableformosttitles(http://my.safaribooksonline.com).Formoreinformation,contactourcorporate/institutionalsalesdepartment:800-998-9938orcorporate@oreilly.com.Editors:MikeLoukidesandMeghanBlanchetteProofreader:MelanieYarbroughProdu

3、ctionEditor:MelanieYarbroughIndexer:AngelaHowardCopyeditor:GillianMcGarveyCoverDesigner:KarenMontgomeryInteriorDesigner:DavidFutatoIllustrator:RobertRomanoNovember2012:FirstEditionRevisionHistoryfortheFirstEdition:2012-11-05FirstreleaseSeehttp://oreilly.com/catalog/errat

4、a.csp?isbn=9781449321888forreleasedetails.NutshellHandbook,theNutshellHandbooklogo,andtheO’ReillylogoareregisteredtrademarksofO’ReillyMedia,Inc.BadDataHandbook,thecoverimageofashort-leggedgoose,andrelatedtradedressaretrade‐marksofO’ReillyMedia,Inc.Manyofthedesignationsus

5、edbymanufacturersandsellerstodistinguishtheirproductsareclaimedastrademarks.Wherethosedesignationsappearinthisbook,andO’ReillyMedia,Inc.,wasawareofatrade‐markclaim,thedesignationshavebeenprintedincapsorinitialcaps.Whileeveryprecautionhasbeentakeninthepreparationofthisboo

6、k,thepublisherandauthorsassumenoresponsibilityforerrorsoromissions,orfordamagesresultingfromtheuseoftheinformationcontainedherein.ISBN:978-1-449-32188-8[LSI]TableofContentsAbouttheAuthors..............................................................ixPreface.............

7、.........................................................xiii1.SettingthePace:WhatIsBadData?............................................12.IsItJustMe,orDoesThisDataSmellFunny?.....................................5UnderstandtheDataStructure6FieldValidation9ValueValidation

8、10PhysicalInterpretationofSimpleStatistics11Visualization12KeywordPPCExample14SearchReferralExample19Re