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Dear All, <br>I am trying to extract the SPECIFIC HUMIDITY for all the levels in vertical (19 Levels from 1000 to 100hPa) from the Model. <br>So I am Using tvrh2q function of Grads. Following is the ctl file. <br><br>'open test.ctl'<br>*'set lev 1000 100'<br>'set t 1'<br> * while (lev< 100)<br>*zlev=1000<br>'set gxout fwrite'<br>'set fwrite test.dat'<br> zlev =1000<br>'define tvk=tk(lev='zlev')+0.61*QVAPOR(lev='zlev')*tk(lev='zlev')'<br>'d tvrh2q(tvk(lev='zlev'),rh(lev='zlev'))'<br>************<br> zlev =950<br>'define tvk=tk(lev='zlev')+0.61*QVAPOR(lev='zlev')*tk(lev='zlev')'<br>'d tvrh2q(tvk(lev='zlev'),rh(lev='zlev'))' <br>*'disable fwrite'<br>*****************<br> zlev =900<br>'define tvk=tk(lev='zlev')+0.61*QVAPOR(lev='zlev')*tk(lev='zlev')'<br>'d tvrh2q(tvk(lev='zlev'),rh(lev='zlev'))' <br>'disable fwrite'<br>***********************<br><br>* endwhile<br><br>I am Unable to Extract the data Using the While Statement in Grads, so I am defining the Zlev separately . <br><br>Kindly Suggest. <br>geeta<br><br> </body>
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