我正试图从R
中的以下链接中提取表格library(rvest)
library(XML)
library(stringr)
library(tidyr)
url <- "http://www.moneycontrol.com/stocks/hist_index_result.php?indian_indices=9"
nifty_index <- url %>%
read_html() %>%
html_nodes(xpath='//*[@id="mc_mainWrapper"]/div[2]/div/div[3]/div[4]/table') %>%
html_table()
nifty_index <- nifty_index[[1]]
Error
Error in matrix(NA_character_, nrow = n, ncol = maxp) :
invalid 'ncol' value (too large or NA)
In addition: Warning messages:
1: In max(p) : no non-missing arguments to max; returning -Inf
2: In matrix(NA_character_, nrow = n, ncol = maxp) :
NAs introduced by coercion to integer range
问题是当我点击链接时http://www.moneycontrol.com/stocks/hist_index_result.php?给我一个空白页面。从此链接http://www.moneycontrol.com/stocks/histstock.php
我如何在R？中做到这一点？