尝试安装rmarkdown软件包给我错误

Question

Error in loadNamespace(j <- i[[1L]], c(lib.loc, .libPaths()), versionCheck = vI[[j]]) : 
  namespace 'xfun' 0.13 is being loaded, but >= 0.15 is required
ERROR: lazy loading failed for package 'knitr'
* removing 'C:/Users/mazen/Documents/R/win-library/3.5/knitr'
In R CMD INSTALL
Warning in install.packages :
  installation of package ‘knitr’ had non-zero exit status
ERROR: dependency 'knitr' is not available for package 'rmarkdown'
* removing 'C:/Users/mazen/Documents/R/win-library/3.5/rmarkdown'
In R CMD INSTALL
Warning in install.packages :
  installation of package ‘rmarkdown’ had non-zero exit status

Answer 1

您需要安装 xfun 的最新版本：

install.packages('xfun')

但是，您的R版本太旧（3.5.x）。使用此旧版本的R，您将无法访问CRAN的预构建二进制版本的 xfun 。您有两个选择：

1. 升级R；
2. 或安装Rtools。

除非您处于禁止您升级R的锁定环境中，否则我强烈建议您升级R，而不要为旧版本的R安装Rtools。