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Dear All, <br>I am trying to use the "gr2stn " function of grads but failed. I am posting the following message from grads. My gridded data file is the gfs grib files. <br><br> ga-> reinit<br>No hardcopy metafile open<br>All files closed; all defined objects released<br>All GrADS attributes have been reinitialized<br>ga-> open 12mar2008<br>Scanning description file: 12mar2008<br>Data file gdas2008031200f00 is open as file 1<br>LON set to 0 360 <br>LAT set to -90 90 <br>LEV set to 1000 1000 <br>Time values set: 2008:3:12:0 2008:3:12:0 <br>ga-> set t 1<br>Time values set: 2008:3:12:0 2008:3:12:0 <br>ga-> set lev 1000<br>LEV set to 1000 1000 <br>ga-> d gr2stn(TMP2M,77.5,12.5)<br>Error from GR2STN: 2nd argument must be stns<br>Operation Error: Error from gr2stn function<br> Error ocurred at column 1<br>DISPLAY error: Invalid expression <br> Expression = gr2stn(tmp2m,77.5,12.5)<br><br><br><br>If I use this function with <b><font style="" color="#ff0000">the WRF output,</font></b> I get the following message. <br>ga-> reinit<br>No hardcopy metafile open<br>All files closed; all defined objects released<br>All GrADS attributes have been reinitialized<br>ga-> open test<br>Scanning description file: test<br>Data file test.dat is open as file 1<br>LON set to 60.2713 89.7287 <br>LAT set to 0.57003 23.9053 <br>LEV set to 1000 1000 <br>Time values set: 2010:4:24:0 2010:4:24:0 <br>ga-> set t 1<br>Time values set: 2010:4:24:0 2010:4:24:0 <br>ga-> set lev 1000<br>LEV set to 1000 1000 <br>ga-> d gr2stn(T2, 77.5, 12.5)<br>Error from GR2STN: Grid must have linear scaling<br>Operation Error: Error from gr2stn function<br> Error ocurred at column 1<br>DISPLAY error: Invalid expression <br> Expression = gr2stn(t2,77.5,12.5)<br>ga-> <br><br>I Think that since WRF output does not have fixed dx and dy so the error. <br><br>Kindly suggest. <br>Geeta<br><br> <br /><hr />All the post budget analysis and implications <a href='http://news.in.msn.com/moneyspecial/budget2010/' target='_new'>Sign up now.</a></body>
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