package doMC不适用于install.packages中的R版本3.0.0警告

Question

对于像doMC和doSMP这样的一些软件包,我会收到警告和无法访问库(doMC).如下图所示,我对subselect没有问题,因此没有文件/目录权限问题.还试过repo = http://cran.us.r-project.org和其他人,没有运气.请指教.

ps:对于意想不到的日文字符,我不知道; 我认为这是一个可分离的问题; 尚未得到support.rstudio.org/help/discussions/problems/6009-japanese-characters-show-unexpectedly的回复

> install.packages('doMC')
Warning in install.packages :
  package ?oMC?is not available (for R version 3.0.0)
Installing package into ?:/Users/YULE/Documents/R/win-library/3.0?(as ?ib?is unspecified)
Warning in install.packages :
  package ?oMC?is not available (for R version 3.0.0)
> install.packages('subselect')
Installing package into ?:/Users/YULE/Documents/R/win-library/3.0?(as ?ib?is unspecified)
trying URL 'http://cran.rstudio.com/bin/windows/contrib/3.0/subselect_0.12-2.zip'
Content type 'application/zip' length 1295653 bytes (1.2 Mb)
opened URL
downloaded 1.2 Mb

package ?ubselect?successfully unpacked and MD5 sums checked

The downloaded binary packages are in
    C:\Users\YULE\AppData\Local\Temp\Rtmp6DK5mn\downloaded_packages
> library(subselect)
---------------------------------------------------------------------------------
> sessionInfo()
R version 3.0.0 (2013-04-03)
Platform: x86_64-w64-mingw32/x64 (64-bit)

locale:
[1] LC_COLLATE=English_United States.1252  LC_CTYPE=English_United States.1252   
[3] LC_MONETARY=English_United States.1252 LC_NUMERIC=C                          
[5] LC_TIME=English_United States.1252    

attached base packages:
[1] graphics  grDevices datasets  stats     utils     methods   base     

other attached packages:
[1] subselect_0.12-2 XML_3.96-1.1     colorspace_1.2-2 RGtk2_2.20.25    rattle_2.6.26   

loaded via a namespace (and not attached):
[1] tools_3.0.0

Answer 1

如果你想为windows安装它,你可以在这里:

install.packages("doMC", repos="http://R-Forge.R-project.org")

我为R 3.2.3版本做了它并且运行良好.

Answer 2

我认为你无法使用它,因为你使用的是Windows.该doMC软件包从未在Windows上提供,因为它取决于mclapply功能,在multicore包之前和现在parallel.我没有听说过doMCR 3.0.0中的任何问题.

该doSMP软件包旨在成为Windows的替代品doMC.我相信它最终被CRAN取消,因为在较新版本的GCC上构建问题.

在doParallel与doSNOW包可能是最流行的foreach可用于Windows后端.