On Mon, 9 Nov 2009, Achim Zeileis wrote:
On Mon, 9 Nov 2009, Johann Hibschman wrote:
I'm using R 2.10.0, with zoo 1.5-8. The release notes for zoo 1.5-8
claim a bug with unique for yearmon objects has been fixed, but I'm
still having problems.
1. Please report such problems (also) to the maintainers and not (only)
to the list.
2. Please provide a reproducible example.
3. Both of the points above are pointed out in the posting guide.
Just as a follow-up to the list: The original poster provided a small
reproducible example off-list, the package authors could identify and fix
the problem (in the - method), an improved version is already on R-Forge
and will be committed in the next days to CRAN. Sometimes life with
open-source software can be so easy ;-)
Z
Browse[1] tmp2
[1] Dec 1996 Dec 1996
Browse[1] unique(tmp2)
[1] Dec 1996 Dec 1996
Browse[1] unique(unique(tmp2))
[1] Dec 1996
Browse[1] as.numeric(tmp2) - (1996 + 11/12)
[1] 0.00e+00 -2.273737e-13
A proper yearmon object should take care of this and have a unique
representation of Dec 1996. But to understand what went wrong, we need to
understand how that malformed Dec 1996 object was created.
Z
Is there a work-around? I had been using an integer months-since-2000
as my month index, so I can go back to doing that, but it's much
harder to interpret those numbers.
Clearly, I'm being bitten by the floating-point representation, but
the only complex thing I did was to manually lag a time series by
assigning date - date + 1/12, and I was hoping that the yearmon class
would apply some magic to normalize the representation.
Regards,
Johann Hibschman
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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.
__
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.
