Dear friends, Hope you are doing great. I would like to process an AIS file (which comes in either a .txt or .csv format). The AIS file is contained in a specific path, say C:/AISFiles/File.txt. The file contains messages like the following: !AIVDM,2,1,2,A,5EPtgd42CRtIADNU at N0<E98v1 at TM8F222222220m1HB586R`0?0kk3k`40CP,0*2D,1532995201 (all of this is a single message). Is there a way to make R automatically retrieve the latest file saved on the path, take each message and convert it to a number? Best regards, Paul [[alternative HTML version deleted]]
The "digest" package might be what you're looking for: messages --> numerics Or perhaps you want to create a hash in R. Search on "hashing in R" or similar for info on this. See ?file.info for obtaining file info, including date/time info. Bert Gunter "The trouble with having an open mind is that people keep coming along and sticking things into it." -- Opus (aka Berkeley Breathed in his "Bloom County" comic strip ) On Mon, Dec 23, 2019 at 10:14 AM Paul Bernal <paulbernal07 at gmail.com> wrote:> Dear friends, > > Hope you are doing great. I would like to process an AIS file (which comes > in either a .txt or .csv format). The AIS file is contained in a specific > path, say C:/AISFiles/File.txt. The file contains messages like the > following: > !AIVDM,2,1,2,A,5EPtgd42CRtIADNU at N0<E98v1 at TM8F222222220m1HB586R > `0?0kk3k`40CP,0*2D,1532995201 > (all of this is a single message). > > Is there a way to make R automatically retrieve the latest file saved on > the path, take each message and convert it to a number? > > Best regards, > > Paul > > [[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. >[[alternative HTML version deleted]]
Hi Paul,
For your first question:
max(file.info(".")$mtime)
[1] "2019-12-21 21:04:19 AEDT"
As for the second, I didn't know what an AIS file was, so I googled
it. I still don't know, so I don't have a clue how to turn a string
like that into a number.
Jim
On Tue, Dec 24, 2019 at 5:14 AM Paul Bernal <paulbernal07 at gmail.com>
wrote:>
> Dear friends,
>
> Hope you are doing great. I would like to process an AIS file (which comes
> in either a .txt or .csv format). The AIS file is contained in a specific
> path, say C:/AISFiles/File.txt. The file contains messages like the
> following:
> !AIVDM,2,1,2,A,5EPtgd42CRtIADNU at N0<E98v1 at
TM8F222222220m1HB586R`0?0kk3k`40CP,0*2D,1532995201
> (all of this is a single message).
>
> Is there a way to make R automatically retrieve the latest file saved on
> the path, take each message and convert it to a number?
>
> Best regards,
>
> Paul
>
> [[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.