无法从github安装R-package

Question

我正在尝试从github安装一个flowIncubator包(包的链接：https://github.com/RGLab/flowIncubator)。我使用的是R版本3.3.1 (2016-06-21)。我已经尝试过这段代码：devtools::install_github("RGLab/flowIncubator") &得到这个错误：

  Error in curl::curl_fetch_disk(url, x$path, handle = handle) : 
      Timeout was reached
    > traceback()
    12: .Call(R_curl_fetch_disk, url, handle, path, "wb", nonblocking)
    11: curl::curl_fetch_disk(url, x$path, handle = handle)
    10: request_fetch.write_disk(req$output, req$url, handle)
    9: request_fetch(req$output, req$url, handle)
    8: request_perform(req, hu$handle$handle)
    7: httr::GET(url, path = path, httr::write_disk(path = tmp))
    6: remote_package_name.github_remote(remote)
    5: remote_package_name(remote)
    4: FUN(X[[i]], ...)
    3: vapply(remotes, install_remote, ..., FUN.VALUE = logical(1))
    2: install_remotes(remotes, quiet = quiet, ...)
    1: devtools::install_github("RGLab/flowIncubator")

我已经尝试更新了devtools和curl这两个包，我已经尝试将R更新到一个较旧的版本，我已经尝试下载.zip文件并通过R studio安装它，然后从库中加载该包。我还尝试将包文件直接放入库中。我使用过函数install.packages()，但无法安装它。

Answer 1

我找到了问题所在。看起来我的DNS服务器非常慢，这就造成了超时问题。

换成Google这样的DNS服务器解决了这个问题。

Answer 2

发生此错误的一个实例是当您处于防火墙之后时。绕过这一点的一种方法是手动下载并安装软件包。

# 1. Find the location where R saves installed packages:
libpath <- .libPaths()

# 2. On the Github webpage of the package you want to install, 
## in the top right corner click on "Clone or download", 
## then click "Download ZIP", save it, unzip it, 
## and place it in the `libpath` directory identified in the previous step.

# 3. In R, set the working directory to `libpath`
setwd(libpath[1])

#4. Install and load the package manually using the `install()` function of 
#   the `devtools` package:
install("flowIncubator")
library(flowIncubator)