On Fri, Sep 12, 2008 at 10:53 AM, Jeff Ryan <[EMAIL PROTECTED]> wrote: > > I'm still not entirely sure I follow the desired usage, as the original post > made no reference to ggplot2, but as Gabor mentioned the yearmon etc stuff > is quite useful.
Well, I said "I need to be able to correct draw date-time scales", which means I need to be able to deal with a wide range of date time data types. I wasn't really aware of xts before - I'll definitely look into it in more detail. > If you are formatting arbitrary precision dates, take a look at > axTicksByTime in xts. Both xts and quantmod use it for plotting. The core > calculation is from ?endpoints > > I think the effect is what you desire --- though the logic of the function > may be more than you want/need. I use it within the package(s) to make > intelligent breaks given the periodicity of the data. That's exactly what I want! I've written my own method, but I think you've done a much nicer job. (Although I draw minor grid lines as well) I'll definitely look at using that function in a future version of ggplot2. > > Some examples are at: http://www.quantmod.com http://www.quantmod.com Very nice - however, I'm philosophically opposed to special purpose plotting functions! > Most of the functions you have written are somewhere within xts already. At > least the functionality is. See the vignette: > http://cran.r-project.org/web/packages/xts/index.html > http://cran.r-project.org/web/packages/xts/index.html Including the ceiling and floor functions? That's what I'm really interested in. Hadley -- http://had.co.nz/ ______________________________________________ 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.
