Exploratory Data Analysis (EDA): Difference between revisions

From InfoVis:Wiki
Jump to navigation Jump to search
WatHdm (talk | contribs)
mNo edit summary
m Reverted edit of WatHdm, changed back to last version by Iwolf
 
(4 intermediate revisions by 2 users not shown)
Line 1: Line 1:
[http://grahrens.125mb.com/view/new/occidentale-gambia/ occidentale (gambia)] [http://gawelzba.t35.com/library/html/il-box.htm il box mostruoso] [http://www.freewebtown.com/starbriteyellow/resources/articles/corse-con.htm corse con uato] [http://scaleslea.freewebpage.org/text/directory/belle-fighe/ belle fighe gratis] [http://lorcaxon.homeblock.com/data/font-animali/ font animali] [http://getm0ney.freewebpage.org/lib/lancia-lybra/ lancia lybra 2.4 jtd lx] [http://grahrens.125mb.com/view/new/la-fidanzata/ la fidanzata di tutti] [http://coarmago.t35.com/content/view/il-diritto/ il diritto dovere] [http://zoelverd.freeweb7.com/description/lib/dvd-a/ dvd a hanging rock] [http://www.freewebtown.com/prncessprncipe/library/html/red-faction.htm red faction] [http://www.freewebtown.com/prncessprncipe/library/html/sylvain.htm sylvain] [http://selemku.t35.com/text/directory/viaccess-keys.htm viaccess keys arabesque] [http://scaleslea.freewebpage.org/text/directory/chat-live/ chat live senza scaricare il dialer] [http://beshennayabelka.freehostia.com/content/view/singola-cerca.htm singola cerca uomo] [http://beshennayabelka.freehostia.com/content/view/western-digital.htm western digital wd740gd] [http://saline-joy.freehostia.com/web/hausmannite.htm hausmannite] [http://kopapguw.homeblock.com/topic/concorso-di/ concorso di mister gay d italia] [http://boreldar.t35.com/text/directory/red-hot.htm red hot chili pepper s] [http://huruple.125mb.com/text/directory/cp-/ cp 35 lazio] [http://selemku.t35.com/text/directory/nwhd-network.htm nw-hd3 network walkman] [http://www.freewebtown.com/boogiejames/topic/s-accessori.htm s5000 accessori] [http://getraylo.freeweb7.com/img/styles/i-segreti.htm i segreti della grande piramide] [http://flheddin.125mb.com/content/view/nike-air.htm nike air max donna] [http://saline-joy.freehostia.com/web/faccia-al.htm faccia al muro] [http://benevolently.freehostia.com/content/view/adventure-in/ adventure in lay] [http://greensticky.freehostia.com/library/html/gel-per/ gel per ricostruzione] [http://boreldar.t35.com/text/directory/le-avventure.htm le avventure di davy crockett] [http://www.freewebtown.com/starbriteyellow/resources/articles/sfondi-matrix.htm sfondi matrix] [http://benevolently.freehostia.com/content/view/notebook-borsa/ notebook borsa samsonite] [http://getraylo.freeweb7.com/img/styles/hotel-a.htm hotel a porto rose] [http://flheddin.125mb.com/content/view/senza-ragione.htm senza ragione] [http://beshennayabelka.freehostia.com/content/view/yamaha-ax.htm yamaha ax 496] [http://coarmago.t35.com/content/view/toma-zdravkovic/ toma zdravkovic] [http://gawelzba.t35.com/library/html/hp-omnibook.htm hp omnibook 500 p3] [http://www.freewebtown.com/boogiejames/topic/www-lauritz.htm www lauritz] [http://zoelverd.freeweb7.com/description/lib/jeans-take/ jeans take -two kimberly] [http://coarmago.t35.com/content/view/concessionario-lada/ concessionario lada] [http://benevolently.freehostia.com/content/view/violenza-sulle/ violenza sulle donne] [http://benevolently.freehostia.com/content/view/caricabatterie-ricaricabili/ caricabatterie ricaricabili] [http://gawelzba.t35.com/library/html/spoof.htm spoof] [http://licohwar.homeblock.com/library/html/serena-grandi/ serena grandi attice nuda] [http://mcwardlo.t35.com/library/html/nebulizzatore-ultrasuoni/ nebulizzatore ultrasuoni] [http://gawelzba.t35.com/library/html/biglietti-visita.htm biglietti visita] [http://wainfan.t35.com/view/new/micro-registratori.htm micro registratori olympus] [http://www.freewebtown.com/starbriteyellow/resources/articles/www-patatine.htm www patatine com] [http://getm0ney.freewebpage.org/lib/behringer-equalizer/ behringer equalizer] [http://oedi.freehostia.com/text/directory/recensione-di/ recensione di madame bovary] [http://saline-joy.freehostia.com/web/kiss-me.htm kiss me sunlight] [http://flheddin.125mb.com/content/view/sapphire-.htm sapphire - ati x850 xt 256mb 256bit vivo] [http://zoelverd.freeweb7.com/description/lib/www-ea/ www ea games it] [http://saline-joy.freehostia.com/web/origini-delle.htm origini delle olimpiadi] [http://benevolently.freehostia.com/content/view/stop-free/ stop free] [http://www.freewebtown.com/starbriteyellow/resources/articles/albergo-male.htm albergo male] [http://zoelverd.freeweb7.com/description/lib/consigli-per/ consigli per truccarsi] [http://saline-joy.freehostia.com/web/creedence.htm creedence] [http://wainfan.t35.com/view/new/jeep-cherokee.htm jeep cherokee td] [http://licohwar.homeblock.com/library/html/hotel-alberghi/ hotel alberghi rimini] [http://www.freewebtown.com/prncessprncipe/library/html/giostre.htm giostre] [http://licohwar.homeblock.com/library/html/copertine-cd/ copertine cd audio] [http://coarmago.t35.com/content/view/scarica-programma/ scarica programma] [http://getm0ney.freewebpage.org/lib/man-rochas/ man rochas] [http://greensticky.freehostia.com/library/html/baldan-bembo/ baldan bembo l amico e] [http://scaleslea.freewebpage.org/text/directory/fiat-punto/ fiat punto jtd hlx] [http://saline-joy.freehostia.com/web/wyatt-sir.htm wyatt, sir thomas] [http://licohwar.homeblock.com/library/html/keilor/ keilor] [http://kopapguw.homeblock.com/topic/un-animale/ un animale irragionevole] [http://flheddin.125mb.com/content/view/go-fast.htm go fast] [http://licohwar.homeblock.com/library/html/ivas-vernici/ ivas vernici] [http://failtoexpress.freehostia.com/html/clopedia.htm clopedia] [http://failtoexpress.freehostia.com/html/benvenuto-il.htm benvenuto il luogo] [http://www.freewebtown.com/boogiejames/topic/cordless-rumblepad.htm cordless rumblepad 2 joystick] [http://www.freewebtown.com/prncessprncipe/library/html/karaoke-perche.htm karaoke perche no] [http://zoelverd.freeweb7.com/description/lib/chat-gay/ chat gay roma gratis] [http://scaleslea.freewebpage.org/text/directory/climatizzatori-mitsubishi/ climatizzatori mitsubishi] [http://lorcaxon.homeblock.com/data/il-nuovo/ il nuovo it] [http://kopapguw.homeblock.com/topic/nauthy-girl/ nauthy girl] [http://www.freewebtown.com/prncessprncipe/library/html/prodotti-per.htm prodotti per dj] [http://beshennayabelka.freehostia.com/content/view/collu.htm collu] [http://benevolently.freehostia.com/content/view/calendario-loredana/ calendario loredana lecciso] [http://benevolently.freehostia.com/content/view/auto-lancia/ auto lancia thesis] [http://saline-joy.freehostia.com/web/voli-da.htm voli da verona a roma] [http://www.freewebtown.com/starbriteyellow/resources/articles/ef-mm.htm ef 28-135mm f 3 5-5 6 is usm] [http://flheddin.125mb.com/content/view/hsas.htm hsas] [http://mauballe.125mb.com/web/agordo-crotone/ agordo crotone] [http://grahrens.125mb.com/view/new/luisa-particolari/ luisa particolari] [http://beshennayabelka.freehostia.com/content/view/te-quiero.htm te quiero tanto tanto] [http://getraylo.freeweb7.com/img/styles/a-chi.htm a chi m idice] [http://mcwardlo.t35.com/library/html/rex-ri/ rex ri 800 xc] [http://failtoexpress.freehostia.com/html/formule-matematica.htm formule matematica finanziaria] [http://wainfan.t35.com/view/new/sony-tv.htm sony tv] [http://gawelzba.t35.com/library/html/usb-fan.htm usb fan] [http://beshennayabelka.freehostia.com/content/view/tutti-i.htm tutti i cartoni] [http://oedi.freehostia.com/text/directory/lacie-data/ lacie data bank 60gb] [http://mcwardlo.t35.com/library/html/abit-ic/ abit ic7] [http://getm0ney.freewebpage.org/lib/prontoenel/ prontoenel] [http://mcwardlo.t35.com/library/html/calma-e/ calma e sangu freddo] [http://failtoexpress.freehostia.com/html/schwelm.htm schwelm] [http://greensticky.freehostia.com/library/html/broken-sword/ broken sword 3 gold in europa] [http://failtoexpress.freehostia.com/html/alberghi-lago.htm alberghi lago iseo] [http://getm0ney.freewebpage.org/lib/la-fattoria/ la fattoria di maiano srl] [http://huruple.125mb.com/text/directory/buona-fortuna/ buona fortuna baglioni] [http://scaleslea.freewebpage.org/text/directory/schemi/ schemi] [http://huruple.125mb.com/text/directory/mister-universo/ mister universo] [http://failtoexpress.freehostia.com/html/buy-alprazolam.htm buy alprazolam] [http://benevolently.freehostia.com/content/view/www-milleuna/ www milleuna tim it] [http://mcwardlo.t35.com/library/html/citrovorum-factor/ citrovorum factor] [http://licohwar.homeblock.com/library/html/thermaltake-tsunami/ thermaltake tsunami va3000swa] [http://getraylo.freeweb7.com/img/styles/phyto.htm phyto] [http://www.freewebtown.com/starbriteyellow/resources/articles/hot-swap.htm hot swap hp] [http://www.freewebtown.com/prncessprncipe/library/html/suoneria-nokia.htm suoneria nokia gratis] [http://saline-joy.freehostia.com/web/electronica.htm electronica] [http://www.freewebtown.com/prncessprncipe/library/html/eos-.htm eos 50 e] [http://zoelverd.freeweb7.com/description/lib/sporca/ sporca] [http://huruple.125mb.com/text/directory/p-didy/ p didy mario] [http://wainfan.t35.com/view/new/video-sexy.htm video sexy 3gp o mp4] [http://licohwar.homeblock.com/library/html/agpx-hdtv/ agp8x hdtv] [http://selemku.t35.com/text/directory/chario-pegasus.htm chario pegasus] [http://zoelverd.freeweb7.com/description/lib/manga-com/ manga com] [http://getraylo.freeweb7.com/img/styles/wva-de.htm wva 510de] [http://lorcaxon.homeblock.com/data/difendi-il/ difendi il tuo] [http://boreldar.t35.com/text/directory/occlusione-intestinale.htm occlusione intestinale] [http://mcwardlo.t35.com/library/html/assorbente-avellino/ assorbente avellino] [http://getraylo.freeweb7.com/img/styles/negozi-tre.htm negozi tre] [http://getm0ney.freewebpage.org/lib/agriturismo-pomezia/ agriturismo pomezia] [http://zoelverd.freeweb7.com/description/lib/wave-master/ wave master] [http://getm0ney.freewebpage.org/lib/orditec/ orditec] [http://scaleslea.freewebpage.org/text/directory/multifunzione-canon/ multifunzione canon con fax] [http://getm0ney.freewebpage.org/lib/la-poetica/ la poetica di svevo] [http://beshennayabelka.freehostia.com/content/view/vampires-zombies.htm vampires zombies] [http://huruple.125mb.com/text/directory/blow-job/ blow job film dvd] [http://greensticky.freehostia.com/library/html/antisala/ antisala] [http://www.freewebtown.com/boogiejames/topic/aepd.htm aepd] [http://getm0ney.freewebpage.org/lib/aeg-frigorifero/ aeg frigorifero] [http://boreldar.t35.com/text/directory/presidentes.htm presidentes] [http://mauballe.125mb.com/web/foto-annunci/ foto annunci incesti] [http://boreldar.t35.com/text/directory/adattatore-bluetooth.htm adattatore bluetooth epson] [http://flheddin.125mb.com/content/view/telefoni-cellulare.htm telefoni cellulare samsung] [http://boreldar.t35.com/text/directory/productos-notables.htm productos notables] [http://zoelverd.freeweb7.com/description/lib/vendita-case/ vendita case amalfi] [http://benevolently.freehostia.com/content/view/billy-joey/ billy joey] [http://wainfan.t35.com/view/new/ibm-intellistation.htm ibm intellistation m pro] [http://gawelzba.t35.com/library/html/kit-ricarica.htm kit ricarica cartuccia] [http://greensticky.freehostia.com/library/html/fitness-models/ fitness models] [http://kopapguw.homeblock.com/topic/roma-calcio/ roma calcio sito ufficiale] [http://coarmago.t35.com/content/view/berengo-fine/ berengo fine arts srl] [http://saline-joy.freehostia.com/web/mature-com.htm mature com] [http://getm0ney.freewebpage.org/lib/george-michael/ george michael] [http://boreldar.t35.com/text/directory/franchising-telefonia.htm franchising telefonia] [http://licohwar.homeblock.com/library/html/tuscany-lodging/ tuscany lodging] [http://www.freewebtown.com/boogiejames/topic/durex-easyon.htm durex easy-on] [http://saline-joy.freehostia.com/web/kracheh.htm kracheh] [http://zoelverd.freeweb7.com/description/lib/stil-unic/ stil unic] [http://grahrens.125mb.com/view/new/portable-dvd/ portable dvd player] [http://www.freewebtown.com/prncessprncipe/library/html/energy-veritas.htm energy veritas] [http://flheddin.125mb.com/content/view/canon-ir.htm canon ir 2200] [http://benevolently.freehostia.com/content/view/convegni-a/ convegni a milano] [http://lorcaxon.homeblock.com/data/uccelli-di/ uccelli di rovo] [http://greensticky.freehostia.com/library/html/p-/ p4 3 6 ghz] [http://grahrens.125mb.com/view/new/agricoltura-e/ agricoltura e silvicoltura - macchine e accessori] [http://lorcaxon.homeblock.com/data/lg-registratore/ lg registratore dvd con hard disk] [http://getraylo.freeweb7.com/img/styles/knights-.htm knights - i cavalieri del futuro] [http://lorcaxon.homeblock.com/data/senza-mutande/ senza mutande] [http://huruple.125mb.com/text/directory/testi-per/ testi per pianoforte] [http://www.freewebtown.com/starbriteyellow/resources/articles/emily-dickinson.htm emily dickinson] [http://lorcaxon.homeblock.com/data/hard-disk/ hard disk 2 5 80 gb samsung 5400rpm] [http://www.freewebtown.com/starbriteyellow/resources/articles/lc-.htm lc 37 sharp] [http://gawelzba.t35.com/library/html/divafutura-it.htm divafutura it] [http://saline-joy.freehostia.com/web/studentesse-camerino.htm studentesse camerino] [http://www.freewebtown.com/prncessprncipe/library/html/last-minute.htm last minute croazia] [http://oedi.freehostia.com/text/directory/sito-e/ sito e nuove immagini per alexander] [http://coarmago.t35.com/content/view/mp-de/ mp3 de los angeles de charly] [http://huruple.125mb.com/text/directory/trascendentalismo/ trascendentalismo] [http://selemku.t35.com/text/directory/uva-uva.htm uva uva] [http://grahrens.125mb.com/view/new/dimensioni-lavastoviglia/ dimensioni lavastoviglia] [http://www.freewebtown.com/prncessprncipe/library/html/monique.htm monique] [http://flheddin.125mb.com/content/view/i-d.htm i d rather go blind] [http://zoelverd.freeweb7.com/description/lib/www-francesco/ www francesco renga] [http://selemku.t35.com/text/directory/katana-bamboo.htm katana bamboo] [http://oedi.freehostia.com/text/directory/ilgrande-baboomba/ ilgrande baboomba] [http://www.freewebtown.com/starbriteyellow/resources/articles/rete-stampanti.htm rete stampanti] [http://wainfan.t35.com/view/new/foto-modelle.htm foto modelle adolescenti] [http://getm0ney.freewebpage.org/lib/reflex-nikon/ reflex nikon digitale d70] [http://huruple.125mb.com/text/directory/crack-of/ crack of call of duty] [http://www.freewebtown.com/prncessprncipe/library/html/simona-regolo.htm simona regolo] [http://gawelzba.t35.com/library/html/www-playtimes.htm www playtimes it] [http://benevolently.freehostia.com/content/view/tecra-m/ tecra m3 1 6] [http://www.freewebtown.com/starbriteyellow/resources/articles/manzini-distretto.htm manzini (distretto)] [http://mcwardlo.t35.com/library/html/phone-effect/ phone effect] [http://mcwardlo.t35.com/library/html/rex-rd/ rex rd 185 dx] [http://beshennayabelka.freehostia.com/content/view/fukaimori.htm fukaimori] [http://coarmago.t35.com/content/view/rivestimento-interno/ rivestimento interno per carrozzine] [http://www.freewebtown.com/prncessprncipe/library/html/panasonic-hd.htm panasonic hd] [http://coarmago.t35.com/content/view/ivona/ ivona] [http://www.freewebtown.com/starbriteyellow/resources/articles/india-movie.htm india movie] [http://selemku.t35.com/text/directory/o-tette.htm o tette] [http://selemku.t35.com/text/directory/condizionatori-rumorosi.htm condizionatori rumorosi] [http://zoelverd.freeweb7.com/description/lib/patchwork-libri/ patchwork libri] [http://failtoexpress.freehostia.com/html/lettori-mp.htm lettori mp3 hp] [http://boreldar.t35.com/text/directory/dialogismo.htm dialogismo] [http://selemku.t35.com/text/directory/macchina-caffe.htm macchina caffe pavoni] {{Definition|'''Exploratory data analysis (EDA)''' was introduced by [[Tukey, John|John Tukey]] as an approach to analyze data when there is only a low level of knowledge about its cause system as well as ''contextual'' information. EDA aims at letting the data itself influence the process of suggesting hypotheses instead of only using it to evaluate given ''(a priori)'' hypotheses.<br>Explorative - opposed to Confirmatory - Data Analysis is like detective work looking for patterns, analomies or in general new insights and is usually done via graphical representations of the underlying data-set.}}
{{Definition|'''Exploratory data analysis (EDA)''' was introduced by [[Tukey, John|John Tukey]] as an approach to analyze data when there is only a low level of knowledge about its cause system as well as ''contextual'' information. EDA aims at letting the data itself influence the process of suggesting hypotheses instead of only using it to evaluate given ''(a priori)'' hypotheses.<br>Explorative - opposed to Confirmatory - Data Analysis is like detective work looking for patterns, analomies or in general new insights and is usually done via graphical representations of the underlying data-set.}}


{{Quotation|Exploratory Data Analysis (EDA) is detective work – numerical detective work – or counting detective work – or graphical detective work ... unless exploratory data analysis uncovers indications, usually quantitative ones, there is likely to be nothing for confirmatory data analysis to consider ... [it] can never be the whole story, but nothing else can serve as the foundation stone - as the first step. |[Tukey, 1977, p. 1-3]}}
{{Quotation|Exploratory Data Analysis (EDA) is detective work – numerical detective work – or counting detective work – or graphical detective work ... unless exploratory data analysis uncovers indications, usually quantitative ones, there is likely to be nothing for confirmatory data analysis to consider ... [it] can never be the whole story, but nothing else can serve as the foundation stone - as the first step. |[Tukey, 1977, p. 1-3]}}
Line 12: Line 12:
Furthermore, EDA can be used to support the selection of appropriate statistical tools as well as to provide a basis for statistical inference and further data collection.  
Furthermore, EDA can be used to support the selection of appropriate statistical tools as well as to provide a basis for statistical inference and further data collection.  


Essential to EDA are graphical tools like ''box plots'', ''stem
Essential to EDA are graphical tools like ''box plots'', ''stem&ndash;and&ndash;leaf plots'', ''scatter plots'', or [[Timeline|timelines]].
 
== References ==
 
*[Filliben, 2004]: James J. Filliben, [http://www.itl.nist.gov/div898/handbook/eda/section1/eda11.htm NIST/SEMATECH e-Handbook of Statistical Methods], Retrieved at: November 15, 2004. http://www.itl.nist.gov/div898/handbook/eda/section1/eda11.htm
*[Keim et al., 2006] Keim, D.A.; Mansmann, F. and Schneidewind, J. and Ziegler, H., Challenges in Visual Data Analysis, Proceedings of Information Visualization (IV 2006), IEEE, p. 9-16, 2006.
*[Smith and Prentice, 1993]: A.F.Smith and D.A. Prentice, ''Exploratory data analysis'', A handbook for data analysis in the behavioral sciences: Statistical issues, pages 349-390, 1993.
*[Tukey, 1977]: John W. Tukey, : Exploratory Data Analysis. Addison-Wesley, 1977.
 
[[Category: Glossary]]

Latest revision as of 08:31, 31 August 2007

Exploratory data analysis (EDA) was introduced by John Tukey as an approach to analyze data when there is only a low level of knowledge about its cause system as well as contextual information. EDA aims at letting the data itself influence the process of suggesting hypotheses instead of only using it to evaluate given (a priori) hypotheses.
Explorative - opposed to Confirmatory - Data Analysis is like detective work looking for patterns, analomies or in general new insights and is usually done via graphical representations of the underlying data-set.
Exploratory Data Analysis (EDA) is detective work – numerical detective work – or counting detective work – or graphical detective work ... unless exploratory data analysis uncovers indications, usually quantitative ones, there is likely to be nothing for confirmatory data analysis to consider ... [it] can never be the whole story, but nothing else can serve as the foundation stone - as the first step.
[Tukey, 1977, p. 1-3]


Exploratory Data Analysis (EDA) is an approach/philosophy for data analysis that employs a variety of techniques (mostly graphical) to maximize
1. insight into a data set;
2. uncover underlying structure;
3. extract important variables;
4. detect outliers and anomalies;
5. test underlying assumptions;
6. develop parsimonious models; and
7. determine optimal factor settings.

The EDA approach is precisely that--an approach--not a set of techniques, but an attitude/philosophy about how a data analysis should be carried out.
[Filliben, 2004]


[...] is concerned primarily with explorations and description of data, not with inference. The techniques are designed to identify fundamental, conceptually meaningful patterns and relationships in data and to call attention to observations that deviate greatly from those fundamental patterns
[Smith and Prentice, 1993]


Exploratory data analysis as the process of searching and analyzing databases to find implicit but potentially useful information, is a difficult task. At the beginning, the analyst has no hypothesis about the data. According to John Tuckey, tools as well as understanding are needed [Tukey, 1977] for the interactive and usually undirected search for structures and trends.
[Keim et al., 2006]



Furthermore, EDA can be used to support the selection of appropriate statistical tools as well as to provide a basis for statistical inference and further data collection.

Essential to EDA are graphical tools like box plots, stem–and–leaf plots, scatter plots, or timelines.

References

  • [Filliben, 2004]: James J. Filliben, NIST/SEMATECH e-Handbook of Statistical Methods, Retrieved at: November 15, 2004. http://www.itl.nist.gov/div898/handbook/eda/section1/eda11.htm
  • [Keim et al., 2006] Keim, D.A.; Mansmann, F. and Schneidewind, J. and Ziegler, H., Challenges in Visual Data Analysis, Proceedings of Information Visualization (IV 2006), IEEE, p. 9-16, 2006.
  • [Smith and Prentice, 1993]: A.F.Smith and D.A. Prentice, Exploratory data analysis, A handbook for data analysis in the behavioral sciences: Statistical issues, pages 349-390, 1993.
  • [Tukey, 1977]: John W. Tukey, : Exploratory Data Analysis. Addison-Wesley, 1977.