[gradsusr] Using Maskout Function To Compute Areal Average

Wed Jan 8 13:26:13 EST 2014

Hi .... From  "
*Error in gagchk: axis sizes are not the sameOperation error:  Incompatable
grids " *there is a mis-match of resolution in both the files.

when you get your maskout file from meteoinfo , you should set spacial
resolution. You just open your temp_var file in grads and start getting
your maskout file again from meteoinfo. And when you need to set x and y
sizes, see your temp_var file and fill in accordingly.

Good luck !

On Wed, Jan 8, 2014 at 11:43 PM, Perry, Aaron @ LSC <Aaron.Perry at lsc.vsc.edu
> wrote:

>  Good Afternoon Kishore,
>
> I've gone back and tried to just use a plain .ctl file instead of sdfopen
> and I am still running into a maelstrom of errors:
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> *Error in gagchk: axis sizes are not the same Operation error:
> Incompatable grids Operation Error:  Error from maskout function Operation
> Error:  Error from aave function   Error ocurred at column 1 DEFINE error:
> Invalid expression. Syntax Error:  Invalid Operand   'avgtemp' not a
> variable or function name   Error ocurred at column 1 DISPLAY error:
> Invalid expression   Expression = avgtemp Syntax Error:  Invalid Operand
> 'avgtemp' not a variable or function name   Error ocurred at column 1
> DISPLAY error:  Invalid expression   Expression = avgtemp Error in format:
> 2rd argument invalid.   Error occurred on line 46   In file
> /home/muaddib/grads/scripts/dec2013/aavetest.gs <http://aavetest.gs>*
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>
> Onward and Upward,
>
> Aaron D. Perry
> Boston, MA
> Lyndon State College '15
> Twitter: @AaronPerryLSC <https://twitter.com/AaronPerryLSC>
> Mobile: 617-780-4312
>     ------------------------------
> *From:* gradsusr-bounces at gradsusr.org [gradsusr-bounces at gradsusr.org] on
> behalf of Kishore Ragi [kishoreragi at gmail.com]
> *Sent:* Wednesday, January 08, 2014 3:43 AM
>
> *To:* GrADS Users Forum
> *Subject:* Re: [gradsusr] Using Maskout Function To Compute Areal Average
>
>   Before going to write a program, just do the following to make sure it
> is working fine.
>
>  go to the working directory and open grads in terminal and invoke the
> following commands:
>
>  'open temp_var.ctl (don't use sdfopen)
> 'open mask.ctl'
> 'd aave(maskout(temp,mask.2(t=1)),lon=-125,lon=-66,lat=24,lat=50)'
>
>  (An instruction before doing this: open ctl file and check path of its
> .data file. If not right, correct the path)
>
>  Cheers,
>
>  Kishore
>
>
>
> On Wed, Jan 8, 2014 at 12:26 PM, Perry, Aaron @ LSC <
> Aaron.Perry at lsc.vsc.edu> wrote:
>
>>  I still can't seem to get this aave(maskout command to run properly.
>>
>> I've attached my script and the associated MeteoInfo-generated ctl file
>> to this email to see if anyone could take a look at it for me.
>>
>>
>>
>> Onward and Upward,
>>
>> Aaron D. Perry
>> Boston, MA
>> Lyndon State College '15
>> Twitter: @AaronPerryLSC <https://twitter.com/AaronPerryLSC>
>> Mobile: 617-780-4312
>>      ------------------------------
>> *From:* gradsusr-bounces at gradsusr.org [gradsusr-bounces at gradsusr.org] on
>> behalf of Kishore Ragi [kishoreragi at gmail.com]
>> *Sent:* Tuesday, January 07, 2014 11:44 PM
>> *To:* GrADS Users Forum
>> *Subject:* Re: [gradsusr] Using Maskout Function To Compute Areal Average
>>
>>    Perry,
>>
>>  you just open your data ctl file and then your maskout ctl file as 2.
>>
>>  for your area average: d
>> aave(maskout(your_var,mask.2(t=1)),lon=X1,lon=X2,lat=Y1,lat=Y2)
>>
>>  mask.2 shows that variable mask is second file and use always (t=1) for
>> mask as the t step is only.
>>
>>  Hope it solves your purpose!!!
>>
>>  Cheers,
>>
>>  Kishore
>>
>>
>> On Wed, Jan 8, 2014 at 9:24 AM, Yaqiang Wang <yaqiang.wang at gmail.com>wrote:
>>
>>> Look at GrADS online document:
>>> http://www.iges.org/grads/gadoc/gradfuncmaskout.html
>>>
>>>  You can open more than one data-descriptor file. Each file is numbered
>>> according to the order in which it was opened.
>>>  http://www.iges.org/grads/gadoc/gradcomdopen.html
>>>
>>>
>>>  On Wed, Jan 8, 2014 at 11:41 AM, Perry, Aaron @ LSC <
>>> Aaron.Perry at lsc.vsc.edu> wrote:
>>>
>>>>   Good Evening All,
>>>>
>>>> I'm currently trying to compute an areal average and I have created a
>>>> masked out control file with MeteoInfo for the area that I'd like to
>>>> compute an average of.
>>>>
>>>> What do I do with the MeteoInfo-created .ctl file now?
>>>>
>>>> The reason why I ask is because there's already a .ctl file for the
>>>> displayed data and now there's one for just the area and I don't think that
>>>> I want to be using them both at the same time...
>>>>
>>>> Any guidance would be greatly appreciated.
>>>>
>>>>
>>>> Onward and Upward,
>>>>
>>>> Aaron D. Perry
>>>> Boston, MA
>>>> Lyndon State College '15
>>>> Twitter: @AaronPerryLSC <https://twitter.com/AaronPerryLSC>
>>>> Mobile: 617-780-4312
>>>>
>>>>  _______________________________________________
>>>> gradsusr mailing list
>>>> gradsusr at gradsusr.org
>>>> http://gradsusr.org/mailman/listinfo/gradsusr
>>>>
>>>>
>>>
>>>
>>>  --
>>> *************************************************
>>> Dr. Yaqiang Wang
>>> Chinese Academy of Meteorological Sciences (CAMS)
>>> 46, Zhong-Guan-Cun South Avenue
>>> Beijing, 100081
>>> China
>>>
>>> yaqiang.wang at gmail.com
>>>
>>> http://www.meteothinker.com
>>> **************************************************
>>>
>>> _______________________________________________
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>>> gradsusr at gradsusr.org
>>> http://gradsusr.org/mailman/listinfo/gradsusr
>>>
>>>
>>
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>
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