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</o:shapelayout></xml><![endif]--></head><body lang=EN-CA link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>If this is the only data being analyzed .. then wouldn’t just setting UNDEF in the ctl file be even easier (though I’ll admit the maskout is way more flexible and necessary if you have a bunch of different variables that each use different missing values).<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><b><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> gradsusr-bounces@gradsusr.org [mailto:gradsusr-bounces@gradsusr.org] <b>On Behalf Of </b>Jeff Duda<br><b>Sent:</b> October 30, 2015 9:46 AM<br><b>To:</b> GrADS Users Forum<br><b>Subject:</b> Re: [gradsusr] Setting missing values (or any value) to undefined<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal>maskout(WC,WC+119.9)<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal>On Fri, Oct 30, 2015 at 10:06 AM, Matt Bunkers - WFO UNR <<a href="mailto:matthew.bunkers@noaa.gov" target="_blank">matthew.bunkers@noaa.gov</a>> wrote:<o:p></o:p></p><div><p class=MsoNormal>Hi,<o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>I have hourly wind chill (WC) grids for which I want to find the minimum WC. The problem I have is that some of the areas of the grids are missing (set to -120). When I compute the minimum WC and then display the result (as either image or contour) I get huge gradients between the real data and the missing data. What I would like to do is set my missing data to undefined (so they don't plot). I've tried that with the const function but that doesn't appear to work. Is there another function that would allow me to set a given value (-120 in this case) of my grid to undefined? If it is set to undefined then when I plot the grid I shouldn't see those horrendous gradients.<o:p></o:p></p></div><div><p class=MsoNormal><br>Thanks,<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>-- Matt<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div></div><p class=MsoNormal style='margin-bottom:12.0pt'><br>_______________________________________________<br>gradsusr mailing list<br><a href="mailto:gradsusr@gradsusr.org">gradsusr@gradsusr.org</a><br><a href="http://gradsusr.org/mailman/listinfo/gradsusr" target="_blank">http://gradsusr.org/mailman/listinfo/gradsusr</a><o:p></o:p></p></div><p class=MsoNormal><br><br clear=all><br>-- <o:p></o:p></p><div><p class=MsoNormal>Jeff Duda<br>Graduate research assistant<br>University of Oklahoma School of Meteorology<br>Center for Analysis and Prediction of Storms<o:p></o:p></p></div></div></div></body></html>