How to obtain a list of directories within a directory, like list.files(), but instead "list.dirs()"

Question

This may be a very easy question for someone - I am able to use list.files() to obtain a list of files in a given directory, but if I want to get a list of directories, how would I do this? Is it somehow right in front of me as an option within list.files()?

Also, I'm using Windows, so if the answer is to shell out to some Linux/unix command, that won't work for me.

.NET for example has a Directory.GetFiles() method, and a separate Directory.GetDirectories() method, so I figured R would have an analogous pair. Thanks in advance.

Answer 1

Update: A list.dirs function was added to the base package in revision 54353, which was included in the R-2.13.0 release in April, 2011.

list.dirs(path = ".", full.names = TRUE, recursive = TRUE) 

So my function below was only useful for a few months. :)

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I couldn't find a base R function to do this, but it would be pretty easy to write your own using:

dir()[file.info(dir())$isdir] 

Update: here's a function (now corrected for Timothy Jones' comment):

list.dirs <- function(path=".", pattern=NULL, all.dirs=FALSE,   full.names=FALSE, ignore.case=FALSE) {   # use full.names=TRUE to pass to file.info   all <- list.files(path, pattern, all.dirs,            full.names=TRUE, recursive=FALSE, ignore.case)   dirs <- all[file.info(all)$isdir]   # determine whether to return full names or just dir names   if(isTRUE(full.names))     return(dirs)   else     return(basename(dirs)) } 

Answer 2

base R now includes a list.dirs function, so home-brewed variants are no longer necessary.

For example:

list.dirs('.', recursive=FALSE)