[gradsusr] how to get average of a country

[Kishore Ragi]

You check if your maskout data is same as your pdsi data ... If data values
are different, it happens. Try to be careful when you are giving grid
specification in Meteoinfo....

Hope this solve your purpose..

Best regards,

Kishore


On Sun, Apr 14, 2013 at 12:34 PM, <fairyes at zju.edu.cn> wrote:

> Dear Kishore，
>
> I  followed with your suggestion and run the next check gs file:
>
> 'sdfopen d:/grads/mada/data.cdf'
> 'open d:/grads/mada/maskout_china.ctl'
> 'set lon 61.25 143.75'
> 'set lat -8.75 56.25'
>
> 'set lev 0 0'
> 'set e 1 1'
> 'set t 114'
> 'd maskout(pdsi,1)'
> ;
> It shows all the area instead of china. So I changed my gs file following
> your suggestion, but it showed some errors as below:
>
> data request error: invalid grid coordinates
>
> world coordinates convert to non-integer grid coordinates
>
> variable=mask.2 dimension=3
>
> operation errer: error from maskout function and aave function and tloop
> function
>
> and so on...
>
> then I checked mask.2:
>
> 'sdfopen d:/grads/mada/data.cdf'
> 'open d:/grads/mada/maskout_china.ctl'
> 'set lon 61.25 143.75'
> 'set lat -8.75 56.25'
>
> 'set lev 0 0'
> 'set e 1 1'
> 'set t 114'
> 'd maskout(pdsi,mask.2)'
> ;
>
> well, it also showed some errors:
>
> data request error: invalid grid coordinates
>
> world coordinates convert to non-integer grid coordinates
>
> variable=mask.2 dimension=3
>
> operation errer: error from maskout function
>
> error ocurred at column 1
>
> display error: invalid expression
>
> expression= maskout(pdsi,mask.2)
>
>
>
> What's wrong with it? Does the ctl file I changed have some errors or
> other problems?
>
> Thanks a lot! Best regards!
>
> Zhihong
>
>  Zhihong Zhuo,Postgraduate Student
>
>  College of Environmental and Resource Sciences, Zhejiang University
>
> Address: 866 Yuhangtan Road, Hangzhou, China
>
> Email: fairyes at zju.edu.cn
>
>
>
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