I’m using R’s list.files function to pull the full name of a file who’s name matches the following actual characters
.test_
and has a file extension of xlsx (the full file name is .test_2022-05-23.xlsx).
When I execute the following syntax
des <- list.files(path = raw, pattern = "\\.test_.*\\.xlsx$")
, des resolves as character(0).
Apparently the leading
\\.
is not correct?
If I remove the leading period from the actual file’s name and execute the following command
des <- list.files(path = raw, pattern = "test_.*\\.xlsx$")
, des resolves to the expected
test_2022-05-23.xlsx
.
What should I set pattern equal to to match the file’s name when the name begins with a period?
Thanks for your help,
Bill
>Solution :
You should be able to set all.files=T like this:
des <- list.files(path = raw, pattern = "\\.test_.*\\.xlsx$", all.files=T)