问Rcpp安装

EN

> install.packages("Rcpp")
Warning in install.packages :
  cannot open URL 'http://www.stats.ox.ac.uk/pub/RWin/src/contrib/PACKAGES.rds': HTTP status was '404 Not Found'
Warning in install.packages :
  cannot open URL 'http://www.stats.ox.ac.uk/pub/RWin/bin/windows/contrib/3.4/PACKAGES.rds': HTTP status was '404 Not Found'

  There is a binary version available but the source version is later:
      binary  source needs_compilation
Rcpp 0.12.10 0.12.11              TRUE

Do you want to install from sources the package which needs compilation?
y/n: y
installing the source package ‘Rcpp’

trying URL 'https://cran.rstudio.com/src/contrib/Rcpp_0.12.11.tar.gz'
Content type 'application/x-gzip' length 2485092 bytes (2.4 MB)
downloaded 2.4 MB

'\\CXXXX0001\Users\RXXXXn'
CMD.EXE was started with the above path as the current directory.
UNC paths are not supported.  Defaulting to Windows directory.
'\\CXXXX0001\Users\RXXXXn\R\R-3.4.0' is not recognized as an internal or external command,
operable program or batch file.
Warning in install.packages :
  running command '"//CXXXX0001/Users/RXXXn/R/R-3.4.0/bin/x64/R" CMD INSTALL -l "\\CXXXX0001\Users\RXXXXn\R\R-3.4.0\library" C:\Users\RXXX~1\AppData\Local\Temp\RtmpmOL8r0/downloaded_packages/Rcpp_0.12.11.tar.gz' had status 1
Warning in install.packages :
  installation of package ‘Rcpp’ had non-zero exit status

The downloaded source packages are in
    ‘C:\Users\RXXXXn\AppData\Local\Temp\RtmpmOL8r0\downloaded_packages’

> install.packages("devtools")
trying URL 'https://cran.rstudio.com/bin/windows/contrib/3.4/devtools_1.13.1.zip'
Content type 'application/zip' length 440923 bytes (430 KB)
downloaded 430 KB

package ‘devtools’ successfully unpacked and MD5 sums checked
Warning in install.packages :
  unable to move temporary installation ‘\\CXXXX0001\Users\RXXXXn\R\R-3.4.0\library\file16401ac3a13\devtools’ to ‘\\CXXXX0001\Users\RXXXXn\R\R-3.4.0\library\devtools’

The downloaded binary packages are in
    C:\Users\RXXXXn\AppData\Local\Temp\RtmpmOL8r0\downloaded_packages
> library(devtools)
Error in library(devtools) : aucun package nommé ‘devtools’ n'est trouvé