[R] Histogram over times (without dates)
Clint Bowman
clint at ecy.wa.gov
Thu Mar 24 18:50:19 CET 2005
I do analyses of that sort all the time with air quality data where I wish
to begin to understand daily behavior -- works well in doing model
evaluation as well.
I'd say your approach should give you useful information; however, I'd
think you'd also be interested in a possible day of week variation.
On Thu, 24 Mar 2005, Greg Snow wrote:
> Have you looked at the "CircStats" and "circular"? They have some plotting functions that may be of help to you.
>
> Greg Snow, Ph.D.
> Statistical Data Center
> greg.snow at ihc.com
> (801) 408-8111
>
> >>> "Dubravko Dolic" <Dubravko.Dolic at komdat.com> 03/24/05 09:38AM >>>
> Dear Group,
>
> Having a character vector like this one:
>
>
>
> [1] "03:38:55" "07:42:38" "08:04:27" "08:17:13" "08:41:14" "08:46:58"
>
> [7] "08:47:11" "08:53:51" "08:57:51" "08:58:56"
>
>
>
> I try to do a histogram over times of a day. All I want to know, if my solution is proper or if there is another way to go.
>
>
>
> There is no Information about the day on which this time occurred. it is unimportant as I want to know at what times on a day a costumer buys anything (times are collected from logfiles).
>
> The values span 24 hours (e.g. 00:00:00 to 23:59:59)
>
>
>
> I converted the characters to chron objects (library(chron)) and then to numeric vectors:
>
>
>
> ordertm.num <- as.numeric(chron(times = ecom$Ordertime))
>
>
>
>
>
> Then I put the numeric values to hist(), printed the hist without axes=F and constructed my own axis.
>
>
>
> The result is satisfactory. But as there are so many possibilities with times on R (namely using the POSIX classes) I want to be shure if there is no "standard" approach to handle such time related problems (note that the date is irrelevant to my problem).
>
>
>
> have a goof Easter holiday
>
>
>
> All the best
>
>
>
> Dubravko Dolic
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
> Dubravko Dolic <http://www.dolic.de/pagedd.html>
>
> -- Statistik --
>
> Tel: +49 (0)89-55 27 44 - 4630
>
> Fax: +49 (0)89-55 27 44 - 2463
>
> Email: dubravko.dolic at komdat.com
>
> --------------------------------------------
>
> Komdat GmbH
>
> Nymphenburger Straße 86 / TH 3
>
> 80636 München
>
> --------------------------------------------
>
> Partners for your success
>
> www.komdat.com <outbind://96-000000009676DC1A07BA5142BC1A44984B6E7FAC070052D1AC81378E9342947189B04176014700000017F023000052D1AC81378E9342947189B04176014700000017F7DA0000/www.komdat.com>
>
> --------------------------------------------
>
>
>
>
> [[alternative HTML version deleted]]
>
> ______________________________________________
> R-help at stat.math.ethz.ch mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
>
> ______________________________________________
> R-help at stat.math.ethz.ch mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
>
--
Clint Bowman INTERNET: clint at ecy.wa.gov
Air Quality Modeler INTERNET: clint at math.utah.edu
Department of Ecology VOICE: (360) 407-6815
PO Box 47600 FAX: (360) 407-7534
Olympia, WA 98504-7600
More information about the R-help
mailing list