[ncl-talk] Remove data for specific area

[Guido Cioni]

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You can alternatively use the mask function, Example #6 on this page (https://www.ncl.ucar.edu/Document/Functions/Built-in/mask.shtml <https://www.ncl.ucar.edu/Document/Functions/Built-in/mask.shtml>) shows the case for 3-D or 4-D arrays.

Good luck 



> On 29. Aug 2017, at 12:43, Dinuka Silva <dinu.kera at gmail.com> wrote:
> 
> Hi Guido,
> Thank you for your help. But how can I use  the where function for three dimensional data because my SST data has three dimensions time, lat and lon. 
> 
> Dinuka
>  
> 
> On Tue, Aug 29, 2017 at 5:06 PM, Guido Cioni <guidocioni at gmail.com <mailto:guidocioni at gmail.com>> wrote:
> Hi,
> if you have a _FillValue correctly set I would advise you to replace the data of SST in that box with missing values. It will keep the dimensionality but prevent you from using those data when computing the correlation.
> You can use the where function (https://www.ncl.ucar.edu/Document/Functions/Built-in/where.shtml <https://www.ncl.ucar.edu/Document/Functions/Built-in/where.shtml>). Look at Example #3
> 
> Cheers
> 
>> On 29. Aug 2017, at 10:01, Dinuka Silva <dinu.kera at gmail.com <mailto:dinu.kera at gmail.com>> wrote:
>> 
>> Hi all,
>> 
>> I want to remove SST data of one box ({03N - 12N}, {90E- 140E}) and then find the correlation between remaining SST data and rainfall index. I want to know how can I remove the SST data of that box.
>> 
>> Thank you .
>> 
>> Dinuka
>> 
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> 
> Guido Cioni
> http://guidocioni.altervista <http://guidocioni.altervista/>.org
> 
> 


Guido Cioni
http://guidocioni.altervista <http://guidocioni.altervista/>.org

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