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
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