xy marker

Hello everyone,
I am trying to put marker on XY plot for specific x axes point, I used
gsn_polymarker but it doesn't work.. Anybody know how to put marker on XY
plot at certain X Values.

Thanks in advance

_____________________________________________________
Ahmed Lasheen
MS Student At university At Albany, SUNY
Department of Atmospheric and Environmental science.
University at Albany, State University of New York1400 Washington Avenue,
Albany, NY 12222
--------------------------------
Researcher at Cairo Numerical Weather Prediction Center (CNWPC)
Egyptian Meteorological Authority(EMA)
Cairo,Egypt
http://nwp.gov.eg/index.php/nwp

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Received on Thu May 2 16:54:49 2013