Rvest html_table 错误 - out[j + k, ] 错误:下标越界 [英] Rvest html_table error - Error in out[j + k, ] : subscript out of bounds

问题描述

我对用 R 抓取有点陌生，但我收到一条我无法理解的错误消息.我的代码:

I'm somewhat new to scraping with R, but I'm getting an error message that I can't make sense of. My code:

 url <- "https://en.wikipedia.org/wiki/California_State_Legislature,_2017%E2%80%9318_session"

leg <- read_html(url)

testdata <- leg %>% 
  html_nodes('table') %>% 
  .[6] %>% 
  html_table()

我收到的回复:

out[j + k, ] 错误:下标越界

Error in out[j + k, ] : subscript out of bounds

当我用 html_text 替换 html_table 时，我没有收到错误消息.知道我做错了什么吗?

When I swap out html_table with html_text I don't get the error. Any idea what I'm doing wrong?

谢谢！

推荐答案

希望对您有所帮助！

library(htmltab)
library(dplyr)
library(tidyr)

url <- "https://en.wikipedia.org/wiki/California_State_Legislature,_2017%E2%80%9318_session"
url %>%
  htmltab(6, rm_nodata_cols = F) %>%
  .[,-1] %>%
  replace_na(list(Notes = "", "Term-limited?" = "")) %>%
  `rownames<-` (seq_len(nrow(.)))

输出为:

  District              Name      Party       Residence Term-limited? Notes
1        1        Ted Gaines Republican El Dorado Hills                    
2        2      Mike McGuire Democratic      Healdsburg                    
3        3         Bill Dodd Democratic            Napa                    
4        4       Jim Nielsen Republican          Gerber                    
5        5 Cathleen Galgiani Democratic        Stockton                    
6        6       Richard Pan Democratic      Sacramento                    
...

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