               else
                 grp4BkgdHist.select("path##{data.ind[d]}").remove()
 
-  # white box above to smother overlap
-  lowsvg.append("rect")
-     .attr("x", 0)
-     .attr("y", 0)
-     .attr("width", w)
-     .attr("height", pad.top)
-     .attr("stroke", "none")
-     .attr("fill", "white")
-
-  # white box to left smother overlap
-  lowsvg.append("rect")
-     .attr("x", 0)
-     .attr("y", 0)
-     .attr("width", pad.left)
-     .attr("height", h)
-     .attr("stroke", "none")
-     .attr("fill", "white")
-
   # box around the outside
   lowsvg.append("rect")
      .attr("x", pad.left)

     .attr("stroke-width", 2)
     .attr("fill", "none")


  svg.append("text")
     .text("Outcome")
     .attr("x", pad.left*0.2)

       .attr("text-anchor", "end")
       .attr("dominant-baseline", "middle")

  # box around the outside
  svg.append("rect")
     .attr("x", pad.left)
