On Thu, 22 Sep 2011, Dennis Murphy wrote:
Question: Do you want 37 different panels with plots of quant vs. date by param, or two panels (one per chemical) with all 37 streams? If you only want two of the eight chemicals,
Dennis, I want only 2 chemicals per plot.
I'd suggest using subset() to select out the pair you want and then redefine the param factor so that the subset data frame has two factor levels instead of eight.
Sure. I keep working with the original data set and haven't yet fully learned to create subsets as needed.
Since there are several ways to interpret 'in which there are data', you might want to expound a little further about your intentions in that regard.
What I mean that over all locations and chemicals the earliest date for which there is data is 1980-03-01. However, some chemicals might not have been required to be monitored before, say, 1990. If the pair in a given plot have no data prior to 1990 (for example), that's what I want as the xlim. 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.
