I don't see the problem. AFAICT, you want plots of quant vs. sampdate by chemicals for each of the 37 streams. Essentially, you seem to want two superimposed time plots in each panel. A time plot is a scatterplot with a time-ordered (usually horizontal) axis.
If you use ggplot2 or lattice to generate the conditioning plots, the default is to use common scales for all panels; this makes eyeball comparisons between plots easier. If you want flexible scales, particularly on the time axis, you'll need to adjust the scales. It's a bit easier to do this in ggplot2, but the lattice approach isn't overly difficult if you have some decent documentation (like the Lattice book) at hand. Dennis On Thu, Sep 22, 2011 at 3:50 PM, Rich Shepard <rshep...@appl-ecosys.com> wrote: > On Thu, 22 Sep 2011, David Winsemius wrote: > >> Scatterplots are for two variables with continuous valued data. You are >> asking about one such variable, apparently within some combination of >> groups of discrete variables. Look at dotplot or bwplot examples. > > David, > > Good catch. Point noted. > > Thanks, > > Rich > > ______________________________________________ > 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. > ______________________________________________ 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.
