The statsby command collects statistics from a command yielding r-class or e-class results across groups of observations and yields a new reduced dataset. statsby is commonly used to graph such data in comparisons of groups; the subsets and total options of statsby are particularly useful in...

Box plots have been a standard statistical graph since John W. Tukey and his colleagues and students publicized them energetically in the 1970s. In Stata, graph box and graph hbox are commands available to draw box plots, but sometimes neither is sufficiently flexible for drawing some variations...