working with summarized data
On Wed, 30 Aug 2006, Rick Bischoff wrote:
Unfortunately, it seems that most(all?) of R's graphics and summary statistic functions don't take a weight or frequency argument. (Fortunately the models do...)
I have been been meaning to add this functionality to my graphics package ggplot (http://had.co.nz/ggplot), but unfortunately haven't had time yet. I'm guessing you want something like: * scatterplot: scale size of point according to weight (can do) * bar chart: bars should have height proportional to weight (can do) * histogram: area proportion to weighting variable (have some half finished code to do) * smoothers: should automatically use weights * boxplot: use weighted quantiles/letter statistics (is there a function for that?) What else is there?
densityplot is the only other one I can think of at the moment... With the rest of those, I could certainly live without it though!
Density plots, scatterplot smoothers, hexbin plots, bubble plots, histograms, and boxplots are available in the survey package. These are probability-weighted rather than frequency-weighted but it doesn't matter for graphics. You could use them as is (which requires setting up a survey design object) or rip the internals out of them. -thomas