连接路径的函数? [英] Function to concatenate paths?
问题描述
是否有连接路径的现有函数?
Is there an existing function to concatenate paths?
我知道实现起来并不难,但仍然......除了处理尾随 /
(或 )之外,我还需要注意适当的操作系统路径格式检测(即我们是写
C:dirfile
还是/dir/file
).
I know it is not that difficult to implement, but still... besides taking care of trailing /
(or ) I would need to take care of proper OS path format detection (i.e. whether we write
C:dirfile
or /dir/file
).
正如我所说,我相信我知道如何实施它;问题是:我应该这样做吗?现有 R 包中是否已存在该功能?
As I said, I believe I know how to implement it; the question is: should I do it? Does the functionality already exist in existing R package?
推荐答案
是的,file.path()
R> file.path("usr", "local", "lib")
[1] "usr/local/lib"
R>
对于包中的文件,还有同样有用的system.path()
:
There is also the equally useful system.path()
for files in a package:
R> system.file("extdata", "date_time_zonespec.csv", package="RcppBDT")
[1] "/usr/local/lib/R/site-library/RcppBDT/extdata/date_time_zonespec.csv"
R>
这将获得文件 extdata/date_time_zonespec.csv
与
- 安装包的位置,以及
- 操作系统
这非常方便.最后,还有
which is very handy. Lastly, there is also
R> .Platform$file.sep
[1] "/"
R>
如果你坚持手动操作.
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