;
; Contour plot exercise 1.
;
load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/gsn_code.ncl"
load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/gsn_csm.ncl"

begin
  z = generate_2d_array(15,15,-10.,110.,0,(/40,40/))

  wks = gsn_open_wks("x11","contour_ex01")    ; Open X11 window

  res                      = True             ; Plot options desired.
  res@gsnMaximize          = True             ; Maximize plot in frame.

  res@cnLevelSelectionMode = "ManualLevels"   ; Manually set contour levels.
  res@cnMinLevelValF       =  5
  res@cnMaxLevelValF       = 95
  res@cnLevelSpacingF      =  5
;
; Note: setting the following two resources instead of the previous
; four resources will have the same effect.  The method below should
; be used mainly if you have contour levels that are irregularly
; spaced.
;
;  res@cnLevelSelectionMode = "ExplicitLevels"
;  res@cnLevels             =  ispan(5,95,5)


  plot = gsn_csm_contour(wks,z,res)
end