Dotchart showing mean and median by group
On Wed, May 9, 2012 at 3:25 AM, maxbre <mbressan at arpa.veneto.it> wrote:
Given this example mean.values<-colMeans(VADeaths) mean.values<-apply(VADeaths, 2, mean) median.values<-apply(VADeaths, 2, median) dotchart(VADeaths, gdata=mean.values) dotchart(VADeaths, gdata=median.values) is it possible to ?combine? a single dotchart showing both the mean and the median for each single group (with different plotting symbols)?
Try this: dotchart(VADeaths, gdata=mean.values) par(new = TRUE) dotchart(VADeaths, gdata=median.values, gpch = 20)
Statistics & Software Consulting GKX Group, GKX Associates Inc. tel: 1-877-GKX-GROUP email: ggrothendieck at gmail.com