Your example of the problem is not reproducible [1]. This behavior could arise due to small discrepancies in the index values, or from specifying "frequency" instead of "f" as the second argument, our perhaps you have found a bug that only your data triggers. Any verification of what your problem is will require a reproducible example.
[1] http://stackoverflow.com/questions/5963269/how-to-make-a-great-r-reproducible-example
I tried to make a piece of reproducible codes.
Would you please paste the following codes to R console and make a confirmation?
#Codes start from here
library("quantmod")
tmp<-structure(c(112.34, 112.89, 112.75, 113.5, 115.16, 115.21, 114.84,
114.93, 115.05, 114.46, 113.34, 113.71, 113.56, 115.08, 115.97,
115.26, 115.22, 115.24, 115.24, 114.98, 111.96, 112.75, 112.5,
113.1, 114.85, 114.55, 114.55, 114.75, 114.2, 112.92, 112.87,
112.8, 113.54, 115.05, 115.06, 114.85, 114.93, 115.09, 114.28,
113.92), class = c("xts", "zoo"), .indexCLASS = "Date", tclass =
"Date", .indexTZ = "", tzone = "", index = structure(c(1298818800,
1298905200, 1298991600, 1299078000, 1299164400, 1299423600, 1299510000,
1299596400, 1299682800, 1299769200), tzone = "", tclass = "Date"),
.Dim = c(10L,
4L), .Dimnames = list(NULL, c("Open", "High", "Low", "Close")))
class(tmp)
(res1<-split(tmp,f="weeks"))
(res2<-split(tmp,frequency="weeks"))
#Codes end here
the original data is saved in "tmp" and the split() results are saved
in res1 and res2.
res1 is the result of "f" and res2 is the resut of "frequency", both break the
week started from "2011-02-28" .... and result of "frequency" is even worse.
BTW, my R version is as following:
version _
platform i686-pc-linux-gnu
arch i686
os linux-gnu
system i686, linux-gnu
status
major 2
minor 15.2
year 2012
month 10
day 26
svn rev 61015
language R
version.string R version 2.15.2 (2012-10-26)
nickname Trick or Treat
Thank you.
Seimizu Joukan