Overlays (basemap+2 contours) in Panel Plot

HI All,

I just wonder why my overlay plots didnt work appropriately (only one
figure appearing) when i want to plot my 4 overlays map to single panel
plot [2x2].
I have the script as follow:

[SNIP]

do i=0,3
  res@tiMainString = "Stream Function and Velocity Potential 850 hPa
~C~ ~Z55~ "+var(i)+ "
  plot1 = gsn_csm_map_ce(wks,mpres)
  plot2 = gsn_csm_contour(wks,sf(i,:,:),res)
  plot3 = gsn_csm_contour(wks,vp(i,:,:),cnres)
  overlay(plot1,plot2)
  overlay(plot1,plot3)
  draw(plot1)
  frame(wks)
end do
  pnlres = True
  pnlres@txString = ""
  pnlres@gsnPanelLabelBar = True
  pnlres@lbLabelAutoStride = True
  pnlres@gsnPanelDebug = True
  gsn_panel(wks,plot1,(/2,2/),pnlres)

end
delete(plot1)
delete(wks)

--
Cheers,

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Received on Sun Sep 23 12:49:03 2012