Stacked Bar Chart (GPL)
SOURCE: s = userSource(id("Employeedata"))
DATA: jobcat=col(source(s), name("jobcat"), unit.category())
DATA: gender=col(source(s), name("gender"), unit.category())
SCALE: linear(dim(2), include(0))
GUIDE: axis(dim(2), label("Count"))
GUIDE: axis(dim(1), label("Job Category"))
ELEMENT: interval.stack(position(summary.count(jobcat)),
color(gender))
