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color polymark with black outline



> Hi,
> 
> I am trying to overlay circles (representing observations) over a fill plot (model output). Using polymark works great for this except when the values match between the two data sets, the circles disappear since they are the same color. I would like to make the colored circles outlined in black so that their locations are clear under these circumstances. I can do this by calling polymark twice with color=black the first time and using a larger circle size for the 2nd call as follows:
> 
> fill/levels=(0)(50,160,10)(1000)/d=1 o3,xlong,xlat
> go polymark poly/over/color=black lon[d=2] lat[d=2] o3[d=2] circle 1
> go polymark poly/over/levels=(0)(50,160,10)(1000) lon[d=2] lat[d=2] o3[d=2] circle 0.9
> 
> My only problem is that there are missing values embedded in the polymark data set that come out as black circles from the first command and then not filled by the 2nd. How can I get the first polymark call to ignore missing values like the 2nd call?
> 
> Thanks for the help.
> 
> -Bill
> 
> _____________________________
> William I. Gustafson Jr., Ph.D.
> Pacific Northwest National Laboratory
> P.O. Box 999, MSIN K9-30
> Richland, WA 99352, USA
> Voice & Msg: (509)372-6110
> FAX: (509)372-6168
> http://www.pnl.gov/atmos_sciences
> 



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