R：直接从网站读取 .DAT 文件时出错答案

【问题标题】：R: Error in Reading a .DAT file directly from websiteR：直接从网站读取 .DAT 文件时出错
【发布时间】：2019-09-08 21:10:35
【问题描述】：

我正在尝试直接从website 读取.DAT 文件并收到以下错误：

abdomen <- read.table("https://www2.stat.duke.edu/courses/Spring03/sta113/Data/Hand/abdomen.dat")

Error in file(file, "rt") : 
  cannot open the connection to 'https://www2.stat.duke.edu/courses/Spring03/sta113/Data/Hand/abdomen.dat'
In addition: Warning messages:
1: In eval(formal.args[[as.character(substitute(arg))]], envir = sys.frame(sysP)) :
  closing unused connection 4 (https://www2.stat.duke.edu/courses/Spring03/sta113/Data/Hand/abdomen.dat)
2: In file(file, "rt") :
  URL 'https://www2.stat.duke.edu/courses/Spring03/sta113/Data/Hand/abdomen.dat': status was 'Peer certificate cannot be authenticated with given CA certificates'

我也试过下面的代码：

abdomen <- read.table(url("https://www2.stat.duke.edu/courses/Spring03/sta113/Data/Hand/abdomen.dat"))
Error in open.connection(file, "rt") : 
  cannot open the connection to 'https://www2.stat.duke.edu/courses/Spring03/sta113/Data/Hand/abdomen.dat'
In addition: Warning message:
In open.connection(file, "rt") :
  URL 'https://www2.stat.duke.edu/courses/Spring03/sta113/Data/Hand/abdomen.dat': status was 'Peer certificate cannot be authenticated with given CA certificates'

任何提示，请。

【问题讨论】：

我在read.table 通话中都没有收到这样的错误

标签： r web url read.table

【解决方案1】：

您很可能被（公司？）防火墙阻止。确保您的代理设置正常工作。

在similar question 上窃取我自己的答案：

## get the proxy settings
system("netsh winhttp show proxy")
Sys.setenv(HTTP_PROXY = <the proxy from netsh>, HTTPS_PROXY = <the proxy from netsh>)

【讨论】：