[ncl-talk] markers with different colors

[Geeta Geeta]

Hi all. 
I was trying to give a different color to the rainfall range (value) recently. My actual data is some 300+ stations an when I run that script, the plot was all crowded . 

I thought of giving a different color to the marker itself without adding the text/rainfall value to the plot. 
here is that part ;---------Adding Markers according to rainfall value

  nrf                     = dimsizes(rf)
  markers                 = new(dimsizes(rf),string)
  dont_mark               = "red"

  res_mark                = True
  res_mark at gsMarkerIndex  = 1  ; 17 predefined markers available
  res_mark at gsMarkerSizeF  = 0.012
;  res_mark at gsMarkerColor = "black"

  do n                             = 0,  nrf-1
     if (rf(n).eq.0.0) then
      res_mark at gsMarkerColor       = "Black"
;     dum =gsn_add_polymarker(wks,plot,lon,lat,res_mark)

        else if ((rf(n).ge.0.1).and.(rf(n).lt.2.4)) then
        res_mark at gsMarkerColor       = "Blue"

           else if ((rf(n).ge.2.5).and.(rf(n).lt.7.5)) then
           res_mark at gsMarkerColor  = "Red"
           end if
        end if
      end if
;  end do

     dum =gsn_add_polymarker(wks,plot,lon,lat,res_mark)
  end do
print(rf+res_mark at gsMarkerColor)
; ----------Now adding text--------------------I get warning like this and the Plot  has Only Black markers????
warning:TransformPostDraw: tfPolyDrawList element 273 is invalid
warning:TransformPostDraw: tfPolyDrawList element 274 is invalid
warning:TransformPostDraw: tfPolyDrawList element 275 is invalid
warning:TransformPostDraw: tfPolyDrawList element 276 is invalid
warning:TransformPostDraw: tfPolyDrawList element 277 is invalid
warning:TransformPostDraw: tfPolyDrawList element 278 is invalid
warning:TransformPostDraw: tfPolyDrawList element 279 is invalid
warning:TransformPostDraw: tfPolyDrawList element 280 is invalid
warning:TransformPostDraw: tfPolyDrawList element 281 is invalid
warning:TransformPostDraw: tfPolyDrawList element 282 is invalid
warning:TransformPostDraw: tfPolyDrawList element 283 is invalid
warning:TransformPostDraw: tfPolyDrawList element 284 is invalid
warning:TransformPostDraw: tfPolyDrawList element 285 is invalid
warning:TransformPostDraw: tfPolyDrawList element 286 is invalid
warning:TransformPostDraw: tfPolyDrawList element 287 is invalid
warning:TransformPostDraw: tfPolyDrawList element 288 is invalid
warning:TransformPostDraw: tfPolyDrawList element 289 is invalid
warning:TransformPostDraw: tfPolyDrawList element 290 is invalid
warning:TransformPostDraw: tfPolyDrawList element 291 is invalid
warning:TransformPostDraw: tfPolyDrawList element 292 is invalid
warning:TransformPostDraw: tfPolyDrawList element 293 is invalid
aditya at agniilap:~/geeta/ncl$ 
kindly suggest. 
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