如何使用rvest R從谷歌新聞獲取標題？

我想獲取在R.使用rvest從谷歌新聞頭條，到目前爲止如何使用rvest R從谷歌新聞獲取標題？

library(rvest) 
url=read_html("https://www.google.com/search?hl=en&tbm=nws&authuser=0&q=american+president") 
selector_name<-"r" 
fnames<-html_nodes(x = url, css = selector_name) %>% 
    html_text()

我已經這樣做了，但結果是

> fnames 
character(0)

這是檢查標題的元素嗎？

<h3 class="r"><a href="/browse.php/PbtvpluS/QDvUJpC7/KoWCA9QE/VTTOFmVJ/bIp8sMa8/qKjgkcAu/Hgcr9lyg/4bibGCOO/nZ82ojLo/_2B602Vo/0sOSEbba/SaiySebj/AqD60GRO/skpNXIW9/fA8EbzOq/z6XjMXo2/9iDad2zD/qREp_2Fp/hoHl64rG/9wfBHOPB/a0nLFrAz/OsCmtfKV/cQoDAFWY/cRXfd5FX/5OAJF8UR/9gUdG_2F/_2F4hOLN/xOfe6_2F/shH2n9O7/hCZGQosp/eeAh6wAC/JhCOgG0i/sLkpRGRN/PH_2B61L/njabdbV1/vpS4wcbX/NKpO_2Bq/jpun2LeG/TQecIESv/vxFbk19Q/_3D_3D/b29/">Obama Addresses Racial Tensions at Celebration of African ...</a></h3>

如何從Google新聞中獲取標題？

來源

2016-09-24 Eka

這可能比較容易抓住RSS提要。有一個['feedeR']（https://cran.rstudio.com/web/packages/feede/index.html）包，看起來只需要一個URL來提取數據。 – alistaire

我認爲你只是缺少類名點：

> headlines = read_html("https://www.google.com/search?hl=en&tbm=nws&authuser=0&q=american+president") %>% 
    html_nodes(".r") %>% 
    html_text() 
> headlines 
[1] "Iranian President: No American President Can Renegotiate the Now ..." 
[2] "US: President Barack Obama vetoes 9/11 bill"       
[3] "President Obama Wants Donald Trump to Visit New African ..."   
[4] "President Obama: Discrimination Should Concern 'All Americans ..." 
[5] "Conrad Black: The Middle East watches, and waits, for the next ..." 
[6] "Putin's close friend: Donald Trump will be next US president"   
[7] "US election 2016 polls and odds: Latest Donald Trump and Hillary ..." 
[8] "US election: Ted Cruz endorses Donald Trump for president"   
[9] "Obama – I'm proud of my 'African record' as US president"    
[10] "Almost 6000 Americans Have Already Voted for President"

來源

2016-09-24 07:22:31 Spacedman

那麼你可以做的：

library(rvest) 
reviews <- link %>% 
    read_html() %>% 
    html_nodes(".g") %>% 
    html_text()

你檢查檢查通過元素在文本（標題是存在），在這種情況下，將G級。然後閱讀每個節點內的文本。

來源

2016-09-24 07:05:05

嗨，你如何抓取所有的搜索結果頁面，以獲得更多使用Rvest的頭條新聞？ – stochastiq

如何使用rvest R從谷歌新聞獲取標題？

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