You did read jannis' reply didn't you?
--
David.
On Aug 30, 2011, at 2:34 PM, Christopher W Ryan wrote:
Here it is with the output:
library(chron)
dts <- dates(c("02/27/92", "02/27/92", "01/14/92","02/28/92",
"02/01/92"))
dts
[1] 02/27/92 02/27/92 01/14/92 02/28/92 02/01/92
dts.chron <- as.chron(dts)
dts.chron
[1] 02/27/92 02/27/92 01/14/92 02/28/92 02/01/92
class(dts.chron)
[1] "dates" "times"
# all of these component extractions work:
months(dts.chron)
[1] Feb Feb Jan Feb Feb
12 Levels: Jan < Feb < Mar < Apr < May < Jun < Jul < Aug < Sep < ...
< Dec
weekdays(dts.chron)
[1] Thu Thu Tue Fri Sat
Levels: Sun < Mon < Tue < Wed < Thu < Fri < Sat
years(dts.chron)
[1] 1992 1992 1992 1992 1992
Levels: 1992
quarters(dts.chron)
[1] 1Q 1Q 1Q 1Q 1Q
Levels: 1Q < 2Q < 3Q < 4Q
# but weeks() doesn't seem to work
weeks(dts.chron)
Error: could not find function "weeks"
?weeks
No documentation for 'weeks' in specified packages and libraries:
you could try '??weeks'
weeks
Error: object 'weeks' not found
week
Error: object 'week' not found
sessionInfo()
R version 2.13.1 (2011-07-08)
Platform: i386-pc-mingw32/i386 (32-bit)
locale:
[1] LC_COLLATE=English_United States.1252
[2] LC_CTYPE=English_United States.1252
[3] LC_MONETARY=English_United States.1252
[4] LC_NUMERIC=C
[5] LC_TIME=English_United States.1252
attached base packages:
[1] stats graphics grDevices utils datasets methods base
other attached packages:
[1] chron_2.3-42
Thanks.
--Chris Ryan
On Tue, Aug 30, 2011 at 1:54 PM, David Winsemius <dwinsem...@comcast.net
> wrote:
On Aug 30, 2011, at 1:36 PM, Christopher W Ryan wrote:
Running R 2.13.1 on Windows XP.
I would like to get week of the year (1-52) for each date.
library(chron)
dts <- dates(c("02/27/92", "02/27/92", "01/14/92","02/28/92",
"02/01/92"))
dts
dts.chron <- as.chron(dts)
dts.chron
class(dts.chron)
# all of these component extractions work:
months(dts.chron)
weekdays(dts.chron)
years(dts.chron)
quarters(dts.chron)
# but weeks() doesn't seem to work
It doesn't "work" for me either but since I also have the package
lubridate
loaded, and ?weeks brings up a lubridate help page, I don't feel I
have any
right to complain. I get an error message.... what did you get?:
Error in Ops.dates(pieces$week, 7) : * not defined for chron objects
If I were posting I would also have had the good sense to include
the output
of sessionInfo().
weeks(dts.chron)
Try type just:
weeks # I get a lubridate function.
?chron tells me:
Bur what does ?weeks tell you?
. . . The functions days(), months(), quarters(),
years(), weeks(), weekdays(), hours(), minutes(), and seconds() take
any chron object as input and extract the corresponding time
interval
. . . .
Any advice?
Thanks.
Chris Ryan
SUNY Upstate Medical University Clinical Campus at Binghamton
Binghamton, NY
______________________________________________
R-help@r-project.org mailing list
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PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
David Winsemius, MD
West Hartford, CT
______________________________________________
R-help@r-project.org mailing list
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.
David Winsemius, MD
West Hartford, CT
______________________________________________
R-help@r-project.org mailing list
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.
