3-D Histogram (GPL)

Figure 1. GPL for 3-D histogram

* Open sample file Employee Data.sav.
GGRAPH
  /GRAPHDATASET NAME="graphdataset" VARIABLES=salary jobcat
  /GRAPHSPEC SOURCE=INLINE.
BEGIN GPL
  SOURCE: s=userSource(id("graphdataset"))
  DATA: salary = col(source(s), name("salary"))
  DATA: jobcat = col(source(s), name("jobcat"), unit.category())
  COORD: rect(dim(1, 2, 3))
  GUIDE: axis(dim(1), label("Employment Category"))
  GUIDE: axis(dim(2), label("Salary"))
  GUIDE: axis(dim(3), label("Count"))
  ELEMENT: interval(position(summary.count(bin.rect(jobcat*salary, dim(2)))))
END GPL.