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Come estrarre dati e commenti degli utenti da articoli e social network

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Alcuni esempi e strumenti su come è possibile estrarre i commenti degli utenti per l'analisi di sentiment e la buzz analysis. Ulteriori informazioni sul sito www.semioanalysis.com

Veröffentlicht in: Daten & Analysen
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Come estrarre dati e commenti degli utenti da articoli e social network

  1. 1. Sentiment Analysis: come estrarre dati e commenti degli utenti da articoli e social network Valentina Porcu valentina@semioanalysis.com Aggiornamento - 1 Ottobre 2014
  2. 2. L’estrazione dei commenti per: • analizzare l’interesse intorno a un soggetto o a un marchio • variazioni dell’interesse nel tempo (ad esempio in seguito a una notizia) • opinione dei commentatori riguardo al brand/soggetto in esame
  3. 3. Per questo motivo si parla di sentiment analysis cosa gli utenti pensano di un prodotto/servizio/candidato buzz analysis monitorare l’interesse nei confronti di un brand
  4. 4. Creare una base dati di commenti degli utenti 1. l’intervallo di tempo da analizzare 2. le pagine dei social network o siti che contengono le conversazioni 3. estrarre i dati
  5. 5. Copiare i dati a mano? É più veloce utilizzare le tecniche per l’estrazione automatica di dati o web scraping
  6. 6. Se sapete programmare Esistono vari strumenti e librerie su più linguaggi di programmazione: Scrapy Portia Gemme di Ruby (Scrubit, Scrapi) Librerie di Python (BeautifulSoup, Urllib2) Quelle di PHP (Curl)
  7. 7. Se non sapete programmare Gli strumenti automatici, ad esempio: Mozenda Heritrix Import.io FMiner Outwit Wire
  8. 8. Utilizzi: le lead lists vengono utilizzati soprattutto per le cosiddette lead lists, delle liste di contatti comprensivi di email e telefoni “confezionate” per i motivi più svariati, dalla creazione di mailing list alle analisi di benchmark o sui competitors
  9. 9. A noi, in questo caso, interessa estrarre i commenti degli utenti esistono vari modi per gestire i commenti degli utenti dal punto di vista di un sito web quindi non è automatico utilizzare sempre lo stesso strumento
  10. 10. Ad esempio, Outwit, anche in versione gratuita, può essere utilizzato per i siti che gestiscono i commenti sulla normale pagina html
  11. 11. Oppure Import.io può essere utilizzato in modalità crawler o extractor per estrarre i commenti ai prodotti di Amazon
  12. 12. Per estrarre le conversazioni dalle pagine pubbliche di Facebook, ad esempio, possiamo usare Datatool
  13. 13. O, infine, potete utilizzare il Comment Extractor per estrarre i commenti dagli articoli con Disqus, da Amazon, dalle pagine pubbliche di Facebook, da IMDB o da Youtube copiando il link che vi interessa
  14. 14. e incollandolo nel Comment Extractor
  15. 15. I file di output sono solitamente in formato xls, csv o json, quasi tutti gestibili con excel
  16. 16. Oltre ai commenti sui siti uno degli strumenti più importanti per la sentiment: …è senza dubbio
  17. 17. Cosa analizzare su Twitter Testi Numero di retweet Numero di preferiti Risposte
  18. 18. Gli strumenti per estrarre i dati da Twitter Sono per la maggior parte a pagamento, e forniscono delle prime analisi dati Qualche esempio: Datasift Tweetarchivist
  19. 19. Oppure…per raccogliere i dati (senza analisi) si può usare Twitter Scraper
  20. 20. Scopri come utilizzare Comment Extractor e Twitter Scraper http://www.semioanalysis.com/downloads/ …puoi anche scaricare le demo dei software
  21. 21. Se l’argomento ti interessa puoi trovarmi qui valentina@semioanalysis.com www.semioanalysis.com Grazie! Valentina

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