Marker colors in scatter plot

Dear all,

In this short code, I am going to set the first 3 markers in red and
last 3 markers in blue. But they are plotted in red. Any problem with
the code?

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("x11","scatter")

  res = True ; plot mods desired
  res@xyMarkLineMode = "Markers" ; choose which have markers
  res@xyMarkers = 16 ; choose type of
marker
  res@xyMarkerColor = (/"red","red","red","blue","blue","blue"/)

  x = ispan(1,6,1)
  y = x+3

  plot = gsn_csm_xy (wks,x,y,res)

end
~

  
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Received on Thu Apr 8 13:28:46 2010