本文介绍了从网页抓取数据表和数据的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我正在尝试从网页中抓取实时流数据表和数据我试过了:
I am trying to webscrape real time streaming data tables and data from a web pageI tried:
library(XML)
webpage <- "http://www.investing.com/indices/us-30"
tables <- readHTMLTable(webpage )
n.rows <- unlist(lapply(tables, function(t) dim(t)[1]))
tables
n.rows
但我收到一个错误.
感谢您的帮助.
推荐答案
实际上我为自己能够使用它而感到自豪(我一直在努力解决这些问题很久了....)
I'm actually proud of myself for getting this to work (I have been trying to get my head around these kinds of things for a long time now....)
library(rvest)
url4 <- "http://www.investing.com/indices/us-30-historical-data"
yourdata <- url4 %>% read_html() %>%
html_nodes(xpath = '//*[@id="results_box"]/table[1]') %>%
html_table()
yourdata <- as.data.frame(yourdata)
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