All,
I have the following files in a directory and I would like only a list of those
starting with ?lld" and ending with ?dat?. I used the following and it
gives me the lld files
list.files(path = readpath, pattern = "^lld[A-Z0-9]")
to get just .dat files I tried
list.files(path = readpath, pattern = "^lld[A-Z0-9].dat$?) but nothing is
returned
below is a dput from the first command. $ is an end of line anchor correct?
What am I doing wrong?
Best,
Glenn
c("lld022017_AB7755_AS0038.dat",
"lld022017_AS0039_AS5210.dat",
"lld022017_AS5211_AS7917.dat",
"lld022017_AS7918_AT8661.dat",
"lld022017_AT8662_AW6667.dat",
"lld022017_AW6668_AZ3066.dat",
"lld022017_AZ3067_BC9534.dat",
"lld022017_BC9535_MA2230.dat",
"lld022017_MA2231_MB0288.dat", "lld022017.zip")
[[alternative HTML version deleted]]
Hello, Maybe if you change the pattern to "^lld[A-Z0-9]*\\.dat$" Hope this helps, Rui Barradas Em 20-02-2017 21:41, Glenn Schultz escreveu:> All, > > I have the following files in a directory and I would like only a list of those starting with ?lld" and ending with ?dat?. I used the following and it gives me the lld files > > list.files(path = readpath, pattern = "^lld[A-Z0-9]") > > to get just .dat files I tried > > list.files(path = readpath, pattern = "^lld[A-Z0-9].dat$?) but nothing is returned > > > below is a dput from the first command. $ is an end of line anchor correct? What am I doing wrong? > > > Best, > Glenn > > c("lld022017_AB7755_AS0038.dat", "lld022017_AS0039_AS5210.dat", > "lld022017_AS5211_AS7917.dat", "lld022017_AS7918_AT8661.dat", > "lld022017_AT8662_AW6667.dat", "lld022017_AW6668_AZ3066.dat", > "lld022017_AZ3067_BC9534.dat", "lld022017_BC9535_MA2230.dat", > "lld022017_MA2231_MB0288.dat", "lld022017.zip") > > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. >
On 21/02/17 10:41, Glenn Schultz wrote:> All, > > I have the following files in a directory and I would like only a list of those starting with ?lld" and ending with ?dat?. I used the following and it gives me the lld files > > list.files(path = readpath, pattern = "^lld[A-Z0-9]") > > to get just .dat files I tried > > list.files(path = readpath, pattern = "^lld[A-Z0-9].dat$?) but nothing is returned > > > below is a dput from the first command. $ is an end of line anchor correct? What am I doing wrong? > > > Best, > Glenn > > c("lld022017_AB7755_AS0038.dat", "lld022017_AS0039_AS5210.dat", > "lld022017_AS5211_AS7917.dat", "lld022017_AS7918_AT8661.dat", > "lld022017_AT8662_AW6667.dat", "lld022017_AW6668_AZ3066.dat", > "lld022017_AZ3067_BC9534.dat", "lld022017_BC9535_MA2230.dat", > "lld022017_MA2231_MB0288.dat", "lld022017.zip")list.files(pattern="^lld.*\\.dat$") seems to work for me. cheers, Rolf -- Technical Editor ANZJS Department of Statistics University of Auckland Phone: +64-9-373-7599 ext. 88276
On Mon, Feb 20, 2017 at 03:41:50PM -0600, Glenn Schultz wrote:> All, > > I have the following files in a directory and I would like only a list of those starting with ?lld" and ending with ?dat?. I used the following and it gives me the lld files > > list.files(path = readpath, pattern = "^lld[A-Z0-9]") > > to get just .dat files I tried > > list.files(path = readpath, pattern = "^lld[A-Z0-9].dat$?) but nothing is returned > > > below is a dput from the first command. $ is an end of line anchor correct? What am I doing wrong?Note that help(list.files) mentions (among other things): | Note: | | File naming conventions are platform dependent. The pattern | matching works with the case of file names as returned by the OS. Also, your pattern ("^lld[A-Z0-9].dat$") does not include the '_' character. I was able to get the results you requested in my environment (FreeBSD stable/11) using: list.files(path = readpath, pattern = "^lld[_A-Z0-9]*.dat$") (Note the '*' in there, as well.) But "filename globbing" is not the same as "regular expressions," and as the above-cited Note warns, results may well be platform-dependent, so be careful.> Best, > Glenn > ....Peace, david -- David H. Wolfskill r at catwhisker.org How could one possibly "respect" a misogynist, racist, bullying con-man??!? See http://www.catwhisker.org/~david/publickey.gpg for my public key. -------------- next part -------------- A non-text attachment was scrubbed... Name: not available Type: application/pgp-signature Size: 603 bytes Desc: not available URL: <https://stat.ethz.ch/pipermail/r-help/attachments/20170220/b504f5a3/attachment.bin>