boxesLx                 Boxes plot summarizing Lexis object
estim.hazard            Estimates hazard function using Poisson model
gv2image                Function makes image from graphviz code
mkflowchart             Function makes flowchart in graphviz
mkratetable             Function makes rate table with confidence
                        intervals for crude incidences (rates)
plotcuminc              Plots cumulative incidence rates
plotratetable           Function makes plot(s) from ratetable
