我正在尝试安装包rpart对于 Windows 7 上的 R-2.14.0，但我收到警告：
包“rpart”不可用（对于 R 版本 2.14.0）
所以我从包页面下载 tar.gz 文件。我已经安装了 Rtools，但禁用了所有选项，包括更改 PATH 的选项。然后我执行以下操作：
> install.packages("C:/rpart_3.1-50.tar.gz", type="source")
Installing package(s) into ‘C:/Users/backupSam/Documents/R/win-library/2.14’
(as ‘lib’ is unspecified)
inferring 'repos = NULL' from the file name
* installing *source* package 'rpart' ...
** libs
*** arch - i386
ERROR: compilation failed for package 'rpart'
* removing 'C:/Users/backupSam/Documents/R/win-library/2.14/rpart'
* restoring previous 'C:/Users/backupSam/Documents/R/win-library/2.14/rpart'
Warning messages:
1: running command 'C:/PROGRA~1/R/R-214~1.0/bin/i386/R CMD INSTALL -l "C:/Users/backupSam/Documents/R/win-library/2.14" "C:/rpart_3.1-50.tar.gz"' had status 1
2: In install.packages("C:/rpart_3.1-50.tar.gz", type = "source") :
installation of package ‘C:/rpart_3.1-50.tar.gz’ had non-zero exit status
有什么建议么？
由于您必须设置PATH，但你对此犹豫不决，因为你担心你可能会搞砸一些东西，你可以通过以下方式在你的 R 会话中暂时这样做：
pathRtools <- paste(c("c:\\Rtools\\bin",
"c:\\Rtools\\MinGW\\bin",
"c:\\MiKTeX\\miktex\\bin",
"c:\\R\\bin\\i386",
"c:\\windows",
"c:\\windows\\system32"), collapse=";")
Sys.setenv(PATH=paste(pathRtools,Sys.getenv("PATH"),sep=";"))
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