我很惊讶library(readr)不能突然加载:
library(readr)
Error in loadNamespace(j <- imp[[1L]], c(lib.loc, .libPaths()), versionCheck = vI[[j]]) :
there is no package called ‘Rcpp’
In addition: Warning message:
package ‘readr’ was built under R version 3.2.2
Error: package or namespace load failed for ‘readr’
所以我尝试了:
install.packages("Rcpp") #with all dependencies
trying URL 'https://cran.rstudio.com/bin/windows/contrib/3.2/Rcpp_0.12.1.zip'
Content type 'application/zip' length 3189720 bytes (3.0 MB)
downloaded 3.0 MB
package ‘Rcpp’ successfully unpacked and MD5 sums checked
Warning in install.packages :
cannot remove prior installation of package ‘Rcpp’
The downloaded binary packages are in
C:\Users\m\AppData\Local\Temp\RtmpMd0LfX\downloaded_packages
之后，我尝试按照SO上的建议进行操作:
install.packages("readr", repos=c("http://rstudio.org/_packages", "http://cran.rstudio.com"))
also installing the dependency ‘Rcpp’
Warning in install.packages :
cannot open: HTTP status was '404 Not Found'
Warning in install.packages :
cannot open: HTTP status was '404 Not Found'
Warning in install.packages :
unable to access index for repository http://rstudio.org/_packages/bin/windows/contrib/3.2
trying URL 'http://cran.rstudio.com/bin/windows/contrib/3.2/Rcpp_0.12.1.zip'
Content type 'application/zip' length 3189720 bytes (3.0 MB)
downloaded 3.0 MB
trying URL 'http://cran.rstudio.com/bin/windows/contrib/3.2/readr_0.1.1.zip'
Content type 'application/zip' length 1128358 bytes (1.1 MB)
downloaded 1.1 MB
package ‘Rcpp’ successfully unpacked and MD5 sums checked
Warning in install.packages :
cannot remove prior installation of package ‘Rcpp’
package ‘readr’ successfully unpacked and MD5 sums checked
The downloaded binary packages are in
C:\Users\m\AppData\Local\Temp\RtmpMd0LfX\downloaded_packages
我想念什么吗？
最佳答案
您使用的是Windows，尝试更新涉及已编译代码的程序包(例如readr和Rcpp)有一个小问题。基本上，如果加载了这些软件包，则无法更新它们；否则，将无法更新它们。而且无法卸载它们。因此，您需要在“原始”模式下重新启动R(即，仅加载基本软件包)。在命令提示符下执行:
R --vanilla
然后，您应该能够安装这些软件包。我会尝试:
install.packages(c("Rcpp", "readr"))
而且你应该很好走。
关于r - 如何安装库(阅读器)？，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/32932354/