;*************************************************
; a default black and white plot with the default
; ncl labeling. All neg contour lines are dashed
; and the zero line is made to be double thickness.
;************************************************
load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/gsn_code.ncl"   
load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/gsn_csm.ncl"    
load "/home/tgcm/ncl/web_ex/func_lib/halfzp2full.ncl"
;************************************************
begin
  in    = addfile("/chewy/d/murphys/files/pyrj001.nc","r") ; pointer to file
  x     = in->TN                              ; read in data
  x     = halfzp("TN",x)                      ; convert to full zp
  ut    = in->ut                              ; required for local time axis

  l2plt = 4                                   ; level index to plot
  t2plt = 2                                   ; time  index to plot
;************************************************
; create plot
;************************************************
  wks = gsn_open_wks("ps" ,"ce")              ; open a ps file

  res                          = True         ; plot mods desired
  res@cnLineLabelPlacementMode = "constant"   ; best line label mode
  res@tiMainString             = "Default Black and White Plot"
  res@gsnCenterString          = "UT = "+ut(t2plt)+" zplev = "+x&lev(l2plt)

  plot = gsn_csm_contour_map_ce(wks,x(t2plt,l2plt,:,:), res)
end