s = random_normal(0,3,2000)
r = True
r@bin_max =  5.
r@bin_min = -5.
y = pdfx(s,10,r)
x = y@bin_center
;x = ispan(1,20,1)
;y = x/2.

w = gsn_open_wks("eps","bar2")
o = True
o@gsnDraw  = False
o@gsnFrame = False
o@gsnXYBarChart = True
p1 = gsn_csm_xy(w,x,y,o)
o@gsnXYBarChartOutlineOnly = True
o@xyLineColor = "red"
p2 = gsn_csm_xy(w,x,y,o)
overlay(p1,p2)
draw(p1)
frame(w)

print("CAUTION: gsnXYBarChartOutlineOnly = True shift the histogram...")