Histogram with Dot Plot (GPL)

Figure 1. GPL for histogram with dot plot

SOURCE: s = userSource(id("Employeedata"))
DATA: salary = col(source(s), name("salary"))
GRAPH: begin(origin(5.0%, 5.0%), scale(90.0%, 90.0%))
COORD: rect(dim(1, 2))
ELEMENT: interval(position(summary.count(bin.rect(salary))),
                  transparency.interior(transparency."0.9"))
GRAPH: end()
GRAPH: begin(origin(5.0%, 5.0%), scale(90.0%, 90.0%))
COORD: rect(dim(1))
GUIDE: axis(dim(1), ticks(null()))
GUIDE: axis(dim(2), ticks(null()))
ELEMENT: point.dodge.asymmetric(position(bin.dot(salary)))
GRAPH: end()