Extract only folder name right before filename from full path

问题

I have the following path

filePath <- "/data/folder1/subfolder1/foo.dat"

I'd like to get subfolder1 which is where foo.dat locates. I saw solutions in other languages but haven't found one in R. What is the simplest way to do it? Thank you!

What I tried

> basename(filePath)
[1] "foo.dat"

> dirname(filePath)
[1] "/data/folder1/subfolder1"

回答1:

This may solve:

filePath <- "/data/folder1/subfolder1/foo.dat"

basename(dirname(filePath))

http://www.r-fiddle.org/#/fiddle?id=IPftVEDk&version=1

回答2:

This may not be the prettiest answer, but it will work for you:

unlist(strsplit(filePath, '/'))[length(unlist(strsplit(filePath, '/')))-1]

来源：https://stackoverflow.com/questions/47189479/extract-only-folder-name-right-before-filename-from-full-path

标签

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