He did not ask for dual axis graphs, Rolf. This can be done with lattice graphics and also with ggplot. See, for example, [1] or [2]. The melt function is a very powerful tool for preparing for this task.
[1] http://www.fromthebottomoftheheap.net/2013/10/23/time-series-plots-with-lattice-and-ggplot/ [2] http://learnr.wordpress.com/2009/05/18/ggplot2-three-variable-time-series-panel-chart/ --------------------------------------------------------------------------- Jeff Newmiller The ..... ..... Go Live... DCN:<jdnew...@dcn.davis.ca.us> Basics: ##.#. ##.#. Live Go... Live: OO#.. Dead: OO#.. Playing Research Engineer (Solar/Batteries O.O#. #.O#. with /Software/Embedded Controllers) .OO#. .OO#. rocks...1k --------------------------------------------------------------------------- Sent from my phone. Please excuse my brevity. On February 2, 2014 12:35:19 PM PST, Rolf Turner <r.tur...@auckland.ac.nz> wrote: > >Just ***DON'T***!!! Very bad idea; usually wildly misleading. >See, e.g.: > >http://www.perceptualedge.com/articles/visual_business_intelligence/dual-scaled_axes.pdf > > >OTOH if you're going to be bloody-minded and do it anyway, there are >brazillions of hits from a Google search which will tell you how. But >I >repeat: ***DON'T***!!! > >cheers, > >Rolf Turner > >On 03/02/14 08:09, David Parkhurst wrote: >> I've tried to figure out how to do this from what I read, but haven't >> been successful. Suppose I have a dataframe with variables Date, X, >and >> Y (and maybe U, V, and Z) where X, Y, etc. have different units. I'd >> like to plot Y vs. Time above X vs. Time, above one another. >> >> For example, X is the number of gulls counted on a reservoir, and Y >is >> the number of coliform bacteria counted on a petri plate from a water >> sample leaving the reservoir, so these have very different ranges. U >and >> V might be numbers of geese and numbers of ducks counted on the same >days. >> >> What commands would I use to create such a set of plots? > >______________________________________________ >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.
