I have a directory with multiple subdirectories that contain files. The files themselves have no extension; however, each file has an additional header file with the extension ".hdr".
In R, I want to list all file names that contain the string map_masked and end with the pattern "masked", but I only want the files without an extension (the ones that end with the pattern, not the header files).
As suggested in this answer, I tried to use the $ sign to indicate the pattern should occur at the end of a line.
This is the code I used:
dir <- "/my/directory" list.files(dir, pattern = "map_masked|masked$", recursive = TRUE) The output, however, looks as follows:
[1] "subdirectory/something_map_masked_something_masked" [2] "subdirectory/something_map_masked_something_masked.hdr" etc. Now, how do I tell R to exclude the files that have an ".hdr" extension? I am aware this could easily be done by applying a filter on the output, but I would rather like to know what is wrong with my code and understand why R behaves the way it does in this case.
