在 R 中抓取basketball-reference.com(XML 包未完全正常工作) [英] Scraping basketball-reference.com in R (XML package not fully working)

问题描述

我已经在 R 中使用readHTMLtable"使用 XML 包在 R 中抓取了篮球参考的各种页面，没有任何问题，但现在我有了一个.当我尝试抓取玩家页面的拆分部分时，它只返回表格的第一行而不是全部.

I have been scraping various pages of basketball-ref for a while now in R with the XML package using "readHTMLtable" without any issues, but now I have one. When I try to scrape the splits section of a player's page, it only return the first line of the table not all.

例如:

URL="http://www.basketball-reference.com/players/j/jamesle01/splits/"
tablefromURL = readHTMLTable(URL)
table = tablefromURL[[1]]

这在表格中只给了我一行，第一行.但是我想要所有的行.我认为问题在于表格中有多个标题，但我不知道如何解决这个问题.

this gives me only one row in the table, the first one. I want all the rows however. I think the problem is that there are multiple headers in the table, but I'm not sure how to fix that.

谢谢

推荐答案

您可以过滤表体:

library(XML)
appURL <- "http://www.basketball-reference.com/players/j/jamesle01/splits/"
doc <- htmlParse(appURL)
appTables <- doc['//table/tbody']

appTables 将是一个包含 12 个没有标题的表的列表.要检索标题，您可以从 thead 获取它们:

appTables would be a list containing the 12 tables sans headers. To retrieve the headers you can get them from the thead:

myHeaders <- unlist(doc["//thead/tr[2]/th", fun = xmlValue])
myTables <- lapply(appTables, readHTMLTable, header = myHeaders)

您可以使用以下方法将数据放入一张大表中:

You can put the data in one big table using something like:

bigTable <- do.call(rbind, myTables)
> head(bigTable)
Split Value   G  GS    MP   FG   FGA   3P  3PA   FT  FTA  ORB  TRB  AST  STL BLK  TOV   PF   PTS  FG%  3P%  FT%
1          Total 871 870 34364 8582 17289 1184 3462 5553 7432 1049 6239 6011 1483 698 2906 1615 23901 .496 .342 .747
2    Place  Home 441 440 17167 4201  8307  567 1627 2805 3706  507 3133 3082  711 387 1413  744 11774 .506 .348 .757
3           Road 430 430 17197 4381  8982  617 1835 2748 3726  542 3106 2929  772 311 1493  871 12127 .488 .336 .738
4 All-Star   Pre 569 568 22349 5544 11167  759 2205 3576 4791  655 4051 3966  967 456 1940 1087 15423 .496 .344 .746
5           Post 302 302 12015 3038  6122  425 1257 1977 2641  394 2188 2045  516 242  966  528  8478 .496 .338 .749
6   Result   Win 572 571 22196 5783 11094  772 2154 3749 4931  677 4241 4132 1032 496 1793 1016 16087 .521 .358 .760
TS% USG% ORtg DRtg   MP  PTS TRB AST
1 .581 31.9  116  103 39.5 27.4 7.2 6.9
2 .592 30.9  118  102 38.9 26.7 7.1 7.0
3 .571 32.8  114  105 40.0 28.2 7.2 6.8
4 .581 31.7  116  103 39.3 27.1 7.1 7.0
5 .582 32.2  117  104 39.8 28.1 7.2 6.8
6 .606 31.7  122   99 38.8 28.1 7.4 7.2

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