问降级R中的包

EN

install.packages('http://cran.rstudio.com/src/contrib/Archive/forecast/forecast_5.9.tar.gz', repos=NULL, type='source')
Installing package into ‘C:/Users/.../Documents/R/win-library/3.2’
(as ‘lib’ is unspecified)
trying URL 'http://cran.rstudio.com/src/contrib/Archive/forecast/forecast_5.9.tar.gz'
Content type 'application/x-gzip' length 156982 bytes (153 KB)
downloaded 153 KB

* installing *source* package 'forecast' ...
** package 'forecast' successfully unpacked and MD5 sums checked
** libs

*** arch - i386
Warning: running command 'make -f "Makevars.win" -f "C:/PROGRA~1/R/R-32~1.1/etc/i386/Makeconf" -f "C:/PROGRA~1/R/R-32~1.1/share/make/winshlib.mk" SHLIB_LDFLAGS='$(SHLIB_CXXLDFLAGS)' SHLIB_LD='$(SHLIB_CXXLD)' SHLIB="forecast.dll" OBJECTS="calcBATS.o calcTBATS.o etsTargetFunction.o etsTargetFunctionWrapper.o etscalc.o etspolyroot.o makeBATSMatrices.o makeTBATSMatrices.o updateMatrices.o updateTBATSMatrices.o"' had status 127
ERROR: compilation failed for package 'forecast'
* removing 'C:/Users/.../Documents/R/win-library/3.2/forecast'
* restoring previous 'C:/Users/.../Documents/R/win-library/3.2/forecast'
Warning in file.copy(lp, dirname(pkgdir), recursive = TRUE, copy.date = TRUE) :
  problem copying C:\Users\...\Documents\R\win-library\3.2\00LOCK-forecast\forecast\libs\x64\forecast.dll to C:\Users\...\Documents\R\win-library\3.2\forecast\libs\x64\forecast.dll: Permission denied
Warning in install.packages :
  running command '"C:/PROGRA~1/R/R-32~1.1/bin/x64/R" CMD INSTALL -l "C:\Users\...\Documents\R\win-library\3.2" "C:/Users/.../AppData/Local/Temp/RtmpQzO3Zp/downloaded_packages/forecast_5.9.tar.gz"' had status 1
Warning in install.packages :
  installation of package ‘C:/Users/.../AppData/Local/Temp/RtmpQzO3Zp/downloaded_packages/forecast_5.9.tar.gz’ had non-zero exit status