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Open data Cul.T.A. Data Visualization

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Publicado el

Lezione sulla Data Visualization tenuta alla Summer School sugli Open Data per la Cultura, il Turismo e l'Ambiente
http://culta.cirsfid.unibo.it/

Publicado en: Datos y análisis
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Open data Cul.T.A. Data Visualization

  1. 1. Data Visualization Tools Matteo Fortini Cul.T.A. Open Data per il Territorio: Cultura, Turismo, Ambiente Ravenna, 20 Ottobre 2015
  2. 2. Usiamo la visualizzazione ● Per esplorare i dati (EDA) ● Per raccontare una storia basata sui dati
  3. 3. Exploratory Data Analysis ● Grafi "grezzi": non curiamo etichette, titoli, didascalie ● Cerchiamo relazioni o pattern ● Cerchiamo distribuzioni e outliers ● Usiamo la forma, il colore, la distribuzione spaziale
  4. 4. EDA: Relazioni fra grandezze Anscombe's quartet (1973): ● stessa media ● stessa varianza ● stessa regressione ● molto diverse "Anscombe's quartet 3" by Anscombe.svg: Schutzderivative work (label using subscripts): Avenue (talk) - Anscombe.svg. Licensed under CC BY-SA 3.0 via Commons
  5. 5. EDA: Relazioni fra grandezze "Petal-sepal". Licensed under CC BY-SA 3.0 via Commons
  6. 6. EDA: Quantità
  7. 7. EDA: Quantità
  8. 8. EDA: Distribuzioni ● Confronti ● Outlier
  9. 9. Relazioni (-> grafi)
  10. 10. Relazioni (-> grafi)
  11. 11. Dati geografici: punti
  12. 12. Dati geografici: heatmap
  13. 13. Dati geografici: choropleth
  14. 14. Dati temporali: sankey "Minard" by Charles Minard (1781-1870) - see upload log. Licensed under Public Domain via Wikimedia Commons
  15. 15. EDA Tool: Foglio Elettronico Excel,Calc,Fogli,Numeri,...e tabelle pivot
  16. 16. EDA Tool: Tableau http://www.tableau.com/
  17. 17. EDA Tool: Datawrapper https://datawrapper.de/
  18. 18. Tool: Datawrapper https://datawrapper.de/
  19. 19. Tool: Datawrapper https://datawrapper.de/
  20. 20. Tool: RAW http://raw.densitydesign.org/
  21. 21. Tool: uMap https://umap.openstreetmap.fr
  22. 22. Tool: CartoDB https://cartodb.com
  23. 23. Visualizzazione ● Permette di descrivere le informazioni in modo chiaro e diretto ● Può essere dedicata alla stampa ● Oppure al web ● Nel secondo caso, possibilmente è interattiva (zoom, ricerca, …)
  24. 24. Una buona visualizzazione
  25. 25. Una buona visualizzazione ● Non mente (oppure sì…) ● È chiara ● Racconta una (sola) storia ● Contiene tutti gli elementi per l'interpretazione ● Specifica una licenza ● Fornisce accesso ai dati raw
  26. 26. Una buona visualizzazione Non mente (oppure sì…)
  27. 27. Una buona visualizzazione Non mente (oppure sì…)
  28. 28. Una buona visualizzazione Cleveland e McGill (1984) "Graphical perception: theory, experimentation and application to the development of graphical methods" NB non è una legge. È chiara Sempre minore accuratezza percettiva
  29. 29. Una buona visualizzazione È chiara?
  30. 30. Una buona visualizzazione È chiara?
  31. 31. Una buona visualizzazione Racconta una sola storia
  32. 32. Una buona visualizzazione È chiara
  33. 33. Una buona visualizzazione Contiene tutti gli elementi per l'interpretazione ● Assi ● Unità di misura ● Titolo ● Didascalia ● Legenda ● Fonti
  34. 34. Tool: R(RStudio)+Web ● Originariamente software statistico ● Completissimo ● Rigoroso ● Difficile ● Grafica molto potente ● Estendibile al web: rCharts, shiny, … https://www.rstudio.com/
  35. 35. (WEB)Tool: Leaflet ● Orientato alle mappe ● Javascript ● Alla base di molti tool come umap ● Grafica molto potente http://leafletjs.com/
  36. 36. (WEB) Tool: SigmaJS ● Orientato alla visualizzazione di grafi ● Javascript ● Versione web di Gephi ● Dinamico http://sigmajs.org/
  37. 37. (WEB) Tool: Timeline.js ● Orientato alla visualizzazione di timeline ● Javascript ● Interattivo https://timeline.knightlab.com/
  38. 38. (WEB) Tool: infogr.am ● Orientato alla visualizzazione di infografiche ● Web-based ● Interattivo https://infogr.am/
  39. 39. (WEB) Tool: Plot.ly ● Da R, Python, Matlab al web ● Web-based ● Interattivo ● Offline a pagamento https://plot.ly/
  40. 40. (WEB) Tool: D3.JS ● Generico, potente ● Javascript ● Alla base di quasi tutti i tool web-based http://d3js.org/
  41. 41. Domande? Grazie per l'attenzione! PERMANENT LINK TO THIS COMIC: HTTP://XKCD.COM/523/

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