Tm.plugin.webmining in R - Google News-Feeds

Question

Ich versuche, Text Mining in R.

Ich Begegnung Probleme zu lernen, wenn es um die Verwendung des tm.plugin.webmining Pakets kommt, wenn zu meiner Google News versuchen und Finanzen Seiten (siehe Codes und Fehlermeldungen unten).

Ich würde jede mögliche Hilfe schätzen, die ich erhalten kann.

Mit GoogleNewsSource

googlenews <- WebCorpus(GoogleNewsSource("Microsoft")) 
Unknown IO errorfailed to load external entity "http://news.google.com/news?hl=en&q=Microsoft&ie=utf-8&num=100&output=rss" 
Error: 1: Unknown IO error2: failed to load external entity "http://news.google.com/news?hl=en&q=Microsoft&ie=utf-8&num=100&output=rss" 

library(tm.plugin.webmining) 
library(purrr) 

company <- c("Microsoft", "Apple", "Google", "Amazon", "Facebook", 
      "Twitter", "IBM", "Yahoo", "Netflix") 
symbol <- c("MSFT", "AAPL", "GOOG", "AMZN", "FB", "TWTR", "IBM", "YHOO", "NFLX") 

download_articles <- function(symbol) { 
    WebCorpus(GoogleFinanceSource(paste0("NASDAQ:", symbol))) 
} 

stock_articles <- data_frame(company = company, 
          symbol = symbol) %>% 
    mutate(corpus = map(symbol, download_articles)) 
failed to load HTTP resource 
Error in mutate_impl(.data, dots) : 1: failed to load HTTP resource 

Answer 1

Das Problem ist in der NASDAQ:TWTR. Das Entfernen beider "Twitter" von company und "TWTR" von symbol behebt den Fehler.

company <- c("Microsoft", "Apple", "Google", "Amazon", "Facebook", "Netflix") 
symbol <- c("MSFT", "AAPL", "GOOG", "AMZN", "FB", "NFLX") 

download_articles <- function(symbol) { 
    WebCorpus(GoogleFinanceSource(paste0("NASDAQ:", symbol))) 
} 
stock_articles <- data_frame(company = company, 
          symbol = symbol) %>% 
    mutate(corpus = map(symbol, download_articles)) 
stock_articles 
#  # A tibble: 6 x 3 
#  company symbol   corpus 
#  <chr> <chr>   <list> 
# 1 Microsoft MSFT <S3: WebCorpus> 
# 2  Apple AAPL <S3: WebCorpus> 
# 3 Google GOOG <S3: WebCorpus> 
# 4 Amazon AMZN <S3: WebCorpus> 
# 5 Facebook  FB <S3: WebCorpus> 
# 6 Netflix NFLX <S3: WebCorpus>