<div dir="ltr">Marian,<div><br></div><div>If you have the latest version of GrADS or OpenGrADS, you could do something like this:</div><div><br></div><div>'define dt=t850-t500'</div><div>'define A=if(dt>25,0,if(dt>=22,2,6)'</div><div>'d A'</div><div><br></div><div>Stephen McMillan</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, Mar 13, 2019 at 4:14 PM AMS EmsiWx Bytča <<a href="mailto:emsiwx@pocasie-bytca.sk" target="_blank">emsiwx@pocasie-bytca.sk</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Dear all,<br>
<br>
<br>
I am going crazy combining const/maskout to get what I need.<br>
<br>
I need to set A according the following:<br>
<br>
A= 0 when T850-T500 >25<br>
<br>
A= 2 when T850-T500 22-25<br>
<br>
A= 6 when T850-T500 <22<br>
<br>
<br>
Would like to ask any master of const/maskout for help.<br>
<br>
<br>
Thank you very much in advance.<br>
<br>
<br>
Marian<br>
<br>
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