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Firstly, I am very new to this and am required to use R and RStudio for a class of mine. My professor hasn't been able to figure out how to help me, and I am very stuck. I have an assignment due Wednesday and I'm in deep trouble.

I am getting the error "Error: package or namespace load failed for ‘plyr’", every time I try to use the command library(plyr) in RStudio, and I have already downloaded plyr. However, there appears to be an issue when downloading it.

Whenever I download it it says:

package ‘Rcpp’ successfully unpacked and MD5 sums checked
Warning in install.packages :
  unable to move temporary installation ‘C:\Users\Mathew\Documents\R\win-library\3.3\file8b0732c54a\Rcpp’ to ‘C:\Users\Mathew\Documents\R\win-library\3.3\Rcpp’
package ‘plyr’ successfully unpacked and MD5 sums checked

Therefore I think the problem is with Rcpp. But when I try to download it, I get this message:

package ‘Rcpp’ successfully unpacked and MD5 sums checked
Warning in install.packages :
  unable to move temporary installation ‘C:\Users\Mathew\Documents\R\win-library\3.3\file8b067215908\Rcpp’ to ‘C:\Users\Mathew\Documents\R\win-library\3.3\Rcpp’
The downloaded binary packages are in
    C:\Users\Mathew\AppData\Local\Temp\Rtmp0I6V54\downloaded_packages

library(plyr) still will not run. I have downloaded them both and deleted them, tried installing the latest Java, restarting my pc, and nothing works. Can anyone please help me? I am desperate.

Bless You All, Mathew

Daniel
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Mathew Nicol
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  • Try to start R with administrator privileges before installing the package. – Philipp Merkle Feb 06 '17 at 20:35
  • I'm on Windows 8.1, sorry should have stated that. So I don't think it's a duplicate. – Mathew Nicol Feb 06 '17 at 20:41
  • Thanks for trying to help, but running with administrator privileges did not seem to help as it still will not run. – Mathew Nicol Feb 06 '17 at 21:01
  • To investigate possible points of friction between Rstudio and WIndows, you could try Process Monitor: https://technet.microsoft.com/de-de/sysinternals/processmonitor.aspx ...hit CTRL+A for autoscroll and see if there are any failed operations. – Philipp Merkle Feb 06 '17 at 21:59
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    Also, this seems to be highly related: http://stackoverflow.com/questions/30308639/r-cran-install-library-rcpp-fails-after-r3-2-upgrade – Philipp Merkle Feb 06 '17 at 22:03
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    Yes, it is a dupe. You *simply cannot update a package you already have loaded* -- it is a Windows system constraint. – Dirk Eddelbuettel Feb 06 '17 at 22:13

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