On Fri, 16 Oct 2009 16:12:40 +0200, Ben Bolker <bol...@ufl.edu> wrote:
PS a parallel problem seems to occur in cut.Date ... cut.POSIXt and
cut.Date
both allow
breaks to be a single integer specifying the number of breaks, and both
call
if(is.null(labels)) levels(res) <- as.character(breaks[-length(breaks)])
near the end of the function, which breaks (so to speak) if
length(breaks)!=length(levels(res))-1
I could keep working on a patch if requested, but probably won't
otherwise.
I believe it's an important issue. In plotting long time series grouping
is indispensable.
Thank you, Ben, for working on that.
May I take this opportunity and propose an additional argument "by" to
"cut" function. This would make cut similar to seq and cut.POSIXt (in the
latter, intervals as "30 s" are allowed in breaks specification).
Conceptually it's often simpler to think in terms of the length of
interval than the number of intervals in "breaks".
Thanks,
Vitalie.
Ben Bolker
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