[英]How can I set a directory through a function?
When I start my PC, my current directory is: 启动PC时,当前目录为:
C:\Users\kieken\Documents
However, my working directory for R should be: 但是,我的R工作目录应该是:
C:\Users\kieken\Dropbox\science\R programming
For this case only, my data is stored in the following folder: 仅在这种情况下,我的数据存储在以下文件夹中:
C:\Users\kieken\Dropbox\science\R programming\specdata
I have to to write a function that uses only the last part of this path: 我必须编写一个仅使用此路径最后一部分的函数:
pollutantmean("specdata", "sulfate", 43:44)
How do I use a variable "directory" in my function definition so that when I assign "specdata" to the variable "directory", everything works fine? 如何在函数定义中使用变量“目录”,以便在将“ specdata”分配给变量“目录”时,一切正常?
You can use file.path
: 您可以使用
file.path
:
path <- "C:\\Users\\kieken\\Dropbox\\science\\R programming"
directory <- "specdata"
mypath <- file.path(path, directory, fsep = "\\")
# [1] "C:\\Users\\kieken\\Dropbox\\science\\R programming\\specdata"
Then you can use 那你可以用
setwd(mypath)
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