Hello, I would like to know how I can filter out empty plots in xyplot, when stratifying on some variables.
Example: I have a dataset in which I plot CONC ~ TIME, stratified for patient ID(1,2,..,100), FORM(1,2) and BOOST (1,2). Some patients (ID's) do not have values for all stratification conditions. I.e. one patient may have values for FORM=1 and BOOST=1,2, while others may have data on alle combinations. xyplot(CONC ~ TIME | ID + FORM + BOOST, dat=data) If I do this I also get empty plots for all the combinations for which I do not have data for. Is it possible for xyplot NOT to make plots for combinations of ID, FORM and BOOST that do not contain data ? Thanks in advance! Coen ______________________________________________ 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.
