draw mark

[liuzf406]

Dear users,
 
I need to draw some stations in my map, and use the following code:
lon='-87.75 -81.8 -120.45 -111.67 -75.55 -97.22 -124.48 -104.755 -100.746 -80.163236'
lat='41.78 40.37 34.9 35.13 35.27 31.62 47.67 40.8064 41.0592 25.7325'
j=1
cn=999
while(j<cn)
 'q w2xy '%subwrd(lon,i)%' '%subwrd(lat,i)
  x = subwrd(result,3)
  y = subwrd(result,6)
  'draw mark 3 'x' 'y' 0.1'
  j=j+1
 endwhile
But it can not work, How can I draw these stations?
 
Thanks so much!
Liu
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