10. R studio/R 工具指南（九：配置R 的启动文件）

file.edit(file.path("~", ".Rprofile"))

# 在启动时使用welcome.First函数

# 当前工作目录
getwd()
<h1>用户主目录</h1><h1>可以直接使用相对路径获取</h1><p>path.expand("~")</p><h1>也可以获得全路径</h1><h1>R安装目录</h1><p>R.home()

#--------------------------------------------</p><h1>Set custom library and temp directory for R</h1><h1>NOTE: please only change following 2 paths</h1><h1>Any Question, please email to</h1><h1>Shixiang Wang <w_shixiang></h1><h1>--------------------------------------------</h1><p>.CUSTOM_LIB = "D:/tools/R/R_Library" # set your custom library location
.TMP = "D:/tools/R/Rtmp"             # set a temp dir for R running</p><h1>please do not add '/' at the end !!!</h1><p>if(!dir.exists(.CUSTOM_LIB)){
dir.create(.CUSTOM_LIB)
}
.libPaths(c(.CUSTOM_LIB, .libPaths()))
message("Using library: ", .libPaths()[1])
if(dirname(tempdir()) != .TMP){
if(!dir.exists(.TMP)) dir.create(.TMP)
cat(paste0("TMPDIR = ", .TMP), file="~/.Renviron", sep = "\n")
}
message("Using temp directory: ", .TMP)
</w_shixiang>