January 2015
Intermediate to advanced
480 pages
14h 15m
English
book
Automated Data Collection with R: A Practical Guide to Web Scraping and Text Mining
by Simon Munzert, Christian Rubba, Peter Meissner, Dominic Nyhuis
Content preview from Automated Data Collection with R: A Practical Guide to Web Scraping and Text Mining
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Part Three A BAG OF CASE STUDIES
Overview of all case studies
| Scraping and information | Main | Important | ||
| Case study | Description | extraction via... | packages | functions |
| Collaboration Networks in the U.S. Senate | Scraping of bill cosponsorship data from the US Senate at thomas.loc.gov, assessment of collaboration network structure | URL manipulation, regular expressions | RCurl, stringr, igraph | getURL(), str_extract(), graph.edgelist(), get.adjacency() |
| Parsing Information from Semi-Structured Documents | Scraping of climate data from Californian weather stations (ftp.wcc.nrcs.usda.gov), construction of a regex-based parser | FTP download, regular expressions and string manipulation tools | RCurl, stringr | getURL(), str_extract(), str_replace() |
| Predicting the 2014 Academy Awards using Twitter | Collection of tweets from Twitter API (dev.twitter.com/docs/api/streaming), frequency-based prediction of Oscar winners | Persistent connection to Streaming API via streamR, regular expressions | streamR, twitteR, lubridate, stringr, plyr | filterStream(), parseTweets(), str_detect(), agrep() |
| Mapping the Geographic Distribution of Names | Scraping phone book data from dastelefonbuch.de, extraction of zip codes and matching with geo-coordinates, creation of family name maps | HTML forms,XPath and regular expressions, R geographic functionality | RCurl, stringr, XML, maptools, maps, rgdal | getForm(), htmlParse(), xpathSApply(), str_extract(), function() |
| Gathering Data on Mobile Phones | Scraping of mobile ... |
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.