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Hi, Cathy —
<div>The global wraping test will fail if XDEF has LEVELS instead of LINEAR. Also, defined variables never wrap. </div>
<div>If neither of those things is true in your situation, check the response when you initially open the file. If the file has passed the wrap test, GrADS will invoke the command ‘set lon 0 360’ no matter what the staring longitude is in your XDEF statement.
So, if you open a file and lon is set o to 360 that is a clue that wrapping is ‘on’. If not, in this case it might say something like:</div>
<div>LON set to 0 359.297</div>
<div><br>
</div>
<div>—Jennifer</div>
<div><br>
<div>
<div>On Jun 29, 2016, at 1:49 PM, James T. Potemra <<a href="mailto:jimp@hawaii.edu">jimp@hawaii.edu</a>> wrote:</div>
<br class="Apple-interchange-newline">
<blockquote type="cite">Kathy,<br>
<br>
I think the problem is you don't have a continuous grid across 0/360.<br>
If your data were, for example, evenly spaced and you had a single value<br>
at 360 then you could do 340 to 415. In this case you don't have any<br>
longitudes greater than 360 defined. You might need to either regrid<br>
or use an external tool (e.g., nco) to redefine longitude. Of course you<br>
could also use "parea" to plot the western side and eastern sides <br>
individually.<br>
<br>
Jim<br>
<br>
On 6/29/16 4:57 AM, Cathy Smith (NOAA Affiliate) wrote:<br>
<blockquote type="cite">Hi all<br>
This should be an easy question but I'm stumped. I'm trying to plot<br>
Africa (20W to 55E). the file I'm plotting from is netCDF and the<br>
longitudes are 0 to 359.27<br>
<br>
e.g.<br>
lon = 0, 0.7031252, 1.40625, 2.109376, 2.812501, 3.515626, 4.218751,<br>
4.921877, 5.625002, 6.328127, 7.031252, 7.734378, 8.437503, 9.140628,<br>
9.843754, 10.54688, 11.25, 11.95313, 12.65625, 13.35938, 14.0625,<br>
......<br>
354.3751, 355.0782, 355.7814, 356.4845, 357.1876, 357.8907, 358.5939,<br>
359.297 ;<br>
<br>
my grads code has<br>
<br>
if( proj = 'africa' )<br>
'set mproj latlon'<br>
'set mpdset mres'<br>
'set lat -40 45'<br>
'set lon -20 55'<br>
'set grid on'<br>
'set frame on'<br>
'set ylint 5'<br>
istate=0<br>
endif<br>
<br>
which plots the data from 0 to 55 only and not the data between 340 and 360.<br>
<br>
I also tried 340 to 415 instead of -20 to 55 and that plotted the data<br>
from 340 to 0 and not 0 to 55.<br>
<br>
What am I doing wrong? I know this can be done in GrADS.<br>
<br>
Thanks<br>
Cathy<br>
<br>
</blockquote>
<br>
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</blockquote>
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<div style="font-size: 12px; orphans: 2; widows: 2;">--</div>
<div style="font-size: 12px; orphans: 2; widows: 2;">Jennifer Miletta Adams<br>
Center for Ocean-Land-Atmosphere Studies (COLA)<br>
George Mason University<br>
<br>
<br>
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