load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/gsn_code.ncl"
load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/gsn_csm.ncl"

begin

 wks = gsn_open_wks("pdf","test9yRlabel")
 gsn_define_colormap(wks,"gui_default")        ; choose colormap
 plot1 = new(1, graphic)

 YL = (/280,300,320,340,360,380,400,420,440/)
 X = (/10,15,20,25,30,35,40,45,50/)

 res = True 
 res@tmYROn     = True              ; turn on the YR tickmarks
 res@tmYRLabelsOn = True              ; turn the YR labels on
 res@tmYUseLeft = False
 res@tmYRMode = "Explicit"  ; explicitly set Y-axis labels
 res@tmYRValues = (/640.00,2200.00,4200.00,6700.00,8000.00,12500.00,14100.00/)
 res@tmYRLabels = (/"640","2200", "4200", "6700", "8000", "12500", "14100"/) 

 plot1 = gsn_csm_xy(wks,X,YL,res)

  getvalues plot1                         ; retrieve some of the plot resources
     "tmYLLabels"  : tmYLLabels          ; values used by NCL at major tick marks
  end getvalues
   getvalues plot1                         ; retrieve some of the plot resources
     "tmYRLabels"  : tmYRLabels          ; values used by NCL at major tick marks
  end getvalues 
 
 printVarSummary(tmYLLabels)
 print(tmYLLabels)
 printVarSummary(tmYRLabels)
 print(tmYRLabels)

frame(wks)
delete(res)

end