代码如下
> workingdir <- getwd() > workingdir
[1] "C:/Documents and Settings/jianhong ou/My Documents"
> subdir = "/4R/downloads/MCF7"
> workingdir <- paste(workingdir,subdir,sep="") > setwd(workingdir)
> getwd()
[1] "C:/Documents and Settings/jianhong ou/My Documents/4R/downloads/MCF7"
这个‘ > ’什么作用?