Code:
use http://www.stata-press.com/data/r13/auto, clear //Histogram with a vertical line at 15, but need to know the right height histogram mpg, fraction addplot(pci 0 15 .35 15) legend(label(2 "My Threshold"))
use http://www.stata-press.com/data/r13/auto, clear //Histogram with a vertical line at 15, but need to know the right height histogram mpg, fraction addplot(pci 0 15 .35 15) legend(label(2 "My Threshold"))