Question

我正在尝试为R安装 readxl 软件包。

以下是RStudio的输出：

To learn more and/or disable this warning message see the "Use secure download method for HTTP" option in Tools -> Global Options -> Packages.
> library('readxl')
Error in library("readxl") : there is no package called ‘readxl’
> install.packages("readxl")
Warning in install.packages :
  unable to access index for repository http://cran.rstudio.com/src/contrib:
  cannot open URL 'http://cran.rstudio.com/src/contrib/PACKAGES'
Installing package into ‘C:/Users/Lenovo/Documents/R/win-library/3.5’
(as ‘lib’ is unspecified)
Warning in install.packages :
  unable to access index for repository http://cran.rstudio.com/src/contrib:
  cannot open URL 'http://cran.rstudio.com/src/contrib/PACKAGES'
Warning in install.packages :
  package ‘readxl’ is not available (for R version 3.5.0)
Warning in install.packages :
  unable to access index for repository http://cran.rstudio.com/bin/windows/contrib/3.5:
  cannot open URL 'http://cran.rstudio.com/bin/windows/contrib/3.5/PACKAGES'
>

以下是R的控制台输出：

Type 'demo()' for some demos, 'help()' for on-line help, or
'help.start()' for an HTML browser interface to help.
Type 'q()' to quit R.

> install.packages("readxl")
Installing package into ‘C:/Users/Lenovo/Documents/R/win-library/3.5’
(as ‘lib’ is unspecified)
--- Please select a CRAN mirror for use in this session ---
Warning: failed to download mirrors file (cannot open URL 'https://cran.r-project.org/CRAN_mirrors.csv'); using local file 'C:/PROGRA~1/R/R-35~1.0/doc/CRAN_mirrors.csv'
Warning: unable to access index for repository https://cloud.r-project.org/src/contrib:
  cannot open URL 'https://cloud.r-project.org/src/contrib/PACKAGES'
Warning: unable to access index for repository https://cloud.r-project.org/bin/windows/contrib/3.5:
  cannot open URL 'https://cloud.r-project.org/bin/windows/contrib/3.5/PACKAGES'
Warning messages:
1: In download.file(url, destfile = f, quiet = TRUE) :
  InternetOpenUrl failed: ''
2: package ‘readxl’ is not available (for R version 3.5.0) 
>

我该如何解决这个问题？

Answer 1

错误消息似乎似乎在告诉您，R无法连接下载软件包。这里有一些想法：

您的用户个人资料是否具有管理权限？我不是Windows的大用户，但是您在技术上正在尝试添加软件，有时这需要升级的特权。也许尝试在Windows中以管理员身份运行R，针对这一问题，看是否是问题所在。（似乎不太可能。）
如果这是防火墙问题，则可以尝试为R和/或Cran存储库的防火墙设置添加例外。
您是否尝试过考虑相关软件包？ install.packages（“ readxl”，dependencies = TRUE）（这也可能导致其自身的问题，因此请注意一下自己。）
您可以下载其他任何软件包吗？当您可以访问Internet进行堆叠张贴时，正在询问一个相当入门的问题，并且URL有效，因此R的安装可能存在配置问题。如果所有其他操作均失败，则可能希望卸载/重新安装R在您的系统上（可能还有Rstudio的情况下），因为如果损坏，这可能有助于修复。使用文件校验和，这是有原因的。

如何安装R的readxl软件包？

1 个答案: