Your are so close ... you just need to specify that you want your histograms to show density, not percent. I've only edited one line of your script, the rest is good and plots nicely:
histogram(~ resp | group, col="steelblue",type="density", ______________________________________________ [email protected] 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.
