[gradsusr] Regarding Temporal Correlation

Kishore Ragi kishoreragi at gmail.com
Wed Mar 30 09:34:01 EDT 2016 

I see that there is some problem with X dimension.

I suggest you to put x and y rather than lon and lat

I guess that you put 'set lon lon1 lon2'  and 'set lat lat1 lat2' . Instead
of that, use 'set x 1 360' and 'set y 1 181'

In this way, you are not going to be misguided of lon lat at all.

Cheers,
Kishore


*PhD student in climate science,*

*National Institute of Technology, Rourkela,*

*India- 769008*






*Phone: +91-8908671881http://www.researchgate.net/profile/Kishore_Ragi
<http://www.researchgate.net/profile/Kishore_Ragi>https://in.linkedin.com/in/kishoreragi
<https://in.linkedin.com/in/kishoreragi>http://kishoreragi.webnode.com/
<http://kishoreragi.webnode.com/>*

On Wed, Mar 30, 2016 at 11:29 PM, Girija Kalyani <kalyani at ncaor.gov.in>
wrote:

> Thanks Mr.Kishore.
> This was mentioned by Mr.Stephen earlier. It is not working. I get the
> same error
> let me put down everything.
> this is my file's description
>
> *ga-> q file 1*
> *File 1 :*
> *  Descriptor: C:\SeaIceStudies-Girija\IMP\Datsets\All_ECMWF\ALL.nc*
> *  Binary: C:\SeaIceStudies-Girija\IMP\Datsets\All_ECMWF\ALL.nc*
> *  Type = Gridded*
> *  Xsize = 360  Ysize = 181  Zsize = 1  Tsize = 444  Esize = 1*
> *  Number of Variables = 10*
> *     ci  0  t,y,x  Sea-ice cover*
> *     sst  0  t,y,x  Sea surface temperature*
> *     p58.162  0  t,y,x  Vertical integral of ozone*
> *     msl  0  t,y,x  Mean sea level pressure*
> *     u10  0  t,y,x  10 metre U wind component*
> *     v10  0  t,y,x  10 metre V wind component*
> *     t2m  0  t,y,x  2 metre temperature*
> *     al  0  t,y,x  Albedo*
> *     si10  0  t,y,x  10 metre wind speed*
> *     ishf  0  t,y,x  Instantaneous surface sensible heat flux*
>
> *After you mentioned I kept trying, Now I get a new error;*
>
> * ga-> d tcorr(tsvar,ci,t=1,t=444) TCORR:  dim = 3, start = 1, end = 444
> Data Request Warning:  Request is completely outside file limits   Entire
> grid contents are set to missing data   Grid limits of file:     X = 1 360
>  Y = 1 181  Z = 1 1  T = 1 444  E = 1 1   Grid limits of request:  X = 0
> 360  Y = -90 -60  Z = 1 1  T = 1 1  E = 1 1   Warning issued for variable =
> ci *
> *Cannot contour grid - all undefined values*
>
> *Is something wrong with my dimensions?*
>
>
> *Girija Kalyani *
> *Junior Research Fellow*
> *Division of Polar Remote Sensing*
> *NCAOR*
>
> ------------------------------
> *From:* gradsusr-bounces at gradsusr.org on behalf of Kishore Ragi
> *Sent:* Wednesday, March 30, 2016 4:18 PM
>
> *To:* GrADS Users Forum
> *Subject:* Re: [gradsusr] Regarding Temporal Correlation
>
> the method you mentioned is working quite well with the data I have.
>
> You just try the following
>
> define tsvar=z          instead of  ts_var=z   if you do not run the .gs
> file.
>
> Hope this helps you.
>
> Regards,
> Kishore
>
>
> *PhD student in climate science, *
>
> *National Institute of Technology, Rourkela, *
>
> *India- 769008 *
>
>
>
>
>
>
> *Phone: +91-8908671881 <%2B91-8908671881>
> http://www.researchgate.net/profile/Kishore_Ragi
> <http://www.researchgate.net/profile/Kishore_Ragi>
> https://in.linkedin.com/in/kishoreragi
> <https://in.linkedin.com/in/kishoreragi> http://kishoreragi.webnode.com/
> <http://kishoreragi.webnode.com/>*
>
> On Wed, Mar 30, 2016 at 8:18 PM, Girija Kalyani <kalyani at ncaor.gov.in>
> wrote:
>
>> Thanks for the response Mr.Kishore. I'm initially trying out to do what
>> they did with the sample file.
>> They have 'z' variable representing geopotential height.
>> But the script isn't working with their data as well.
>> Once it works well with sample I wanted to shift to my data.
>> I have sea-ice, wind, MSL, SLP, Albedo data for past 36 years.
>> All of same spatial and temporal extent.
>> I wanted to perform spatio-temporal correlational analysis with atleast 2
>> variables (of those that are mentioned above).
>> I hope I was clear enough.
>> Many Thanks
>>
>>
>>
>>
>> ------------------------------
>> *From:* gradsusr-bounces at gradsusr.org on behalf of Kishore Ragi
>> *Sent:* Wednesday, March 30, 2016 12:57 PM
>>
>> *To:* GrADS Users Forum
>> *Subject:* Re: [gradsusr] Regarding Temporal Correlation
>>
>> Hi,
>>
>> z is their variable (geopotential height). They have defined *ts_var for
>> a specific location for the period of time. Then they tried to correlate
>> that point with *
>>
>>
>>
>> *'set lat 0 90'     'set lon 180 360'   region. You see what you are
>> trying to do. If it is same you are trying to, its fine (but choose the
>> variable that you have in the file). If not, lets us know what you want so
>> that one of the group members may help you out. *
>>
>> *Regards, *
>>
>> *Kishore *
>>
>>
>>
>>
>> *PhD student in climate science, *
>>
>> *National Institute of Technology, Rourkela, *
>>
>> *India- 769008 *
>>
>>
>>
>>
>>
>>
>> *Phone: +91-8908671881 <%2B91-8908671881>
>> http://www.researchgate.net/profile/Kishore_Ragi
>> <http://www.researchgate.net/profile/Kishore_Ragi>
>> https://in.linkedin.com/in/kishoreragi
>> <https://in.linkedin.com/in/kishoreragi> http://kishoreragi.webnode.com/
>> <http://kishoreragi.webnode.com/>*
>>
>> On Wed, Mar 30, 2016 at 5:52 PM, Girija Kalyani <kalyani at ncaor.gov.in>
>> wrote:
>>
>>> Oh Yes.
>>> I check the variables the similar way. And Im aware that this variable
>>> is not in the file.
>>> But it is given in this link (*http://gradsaddict.blogspot.in/2013/05/tutorial-use-tcorr-function-to-create.html
>>> <http://gradsaddict.blogspot.in/2013/05/tutorial-use-tcorr-function-to-create.html>*
>>> )
>>> that time-series should be defined this way.
>>>
>>>
>>> *Girija Kalyani *
>>> *Junior Research Fellow*
>>> *Division of Polar Remote Sensing*
>>> *NCAOR*
>>>
>>> ------------------------------
>>> *From:* gradsusr-bounces at gradsusr.org on behalf of Kishore Ragi
>>> *Sent:* Wednesday, March 30, 2016 10:31 AM
>>>
>>> *To:* GrADS Users Forum
>>> *Subject:* Re: [gradsusr] Regarding Temporal Correlation
>>>
>>> check the variables in the file using
>>>
>>> q file
>>>
>>> If you find z as one of the variable, you should not have any problem
>>> with your code.
>>>
>>> Also, I am curious to know why you want to define
>>>
>>> *ts_var=z *
>>>
>>> *Regards, *
>>>
>>> *Kishore *
>>>
>>>
>>> *PhD student in climate science, *
>>>
>>> *National Institute of Technology, Rourkela, *
>>>
>>> *India- 769008 *
>>>
>>>
>>>
>>>
>>>
>>>
>>> *Phone: +91-8908671881 <%2B91-8908671881>
>>> http://www.researchgate.net/profile/Kishore_Ragi
>>> <http://www.researchgate.net/profile/Kishore_Ragi>
>>> https://in.linkedin.com/in/kishoreragi
>>> <https://in.linkedin.com/in/kishoreragi> http://kishoreragi.webnode.com/
>>> <http://kishoreragi.webnode.com/>*
>>>
>>> On Wed, Mar 30, 2016 at 2:46 PM, Girija Kalyani <kalyani at ncaor.gov.in>
>>> wrote:
>>>
>>>> Thanks for the response Mr.Stephen.
>>>> I tried removing the underscore as directed, but still the error did
>>>> not change.
>>>> It produces
>>>> Syntax Error: Invalid Operand
>>>> 'z' is not a function name
>>>> Define Error: Invalid Expression
>>>>
>>>>
>>>> *Girija Kalyani *
>>>> *Junior Research Fellow*
>>>> *Division of Polar Remote Sensing*
>>>> *NCAOR*
>>>>
>>>> ------------------------------
>>>> *From:* gradsusr-bounces at gradsusr.org on behalf of Stephen McMillan
>>>> *Sent:* Tuesday, March 29, 2016 5:54 PM
>>>> *To:* GrADS Users Forum
>>>> *Subject:* Re: [gradsusr] Regarding Temporal Correlation
>>>>
>>>> Girija,
>>>>
>>>> Remove the "_" from your variable name.  GrADS doesn't like that or
>>>> other special characters (numerals are okay if not the first character).
>>>>
>>>> In the future, when you have an error, please say what the error was.
>>>> This was an easy case, but sometimes one could only guess.
>>>>
>>>> Good luck--
>>>> Stephen Mc
>>>>
>>>> On Tue, Mar 29, 2016 at 7:41 AM, Girija Kalyani <kalyani at ncaor.gov.in>
>>>> wrote:
>>>>
>>>>> Good Evening,
>>>>>
>>>>> I'm using Grads 2.0.2 on Windows desktop.
>>>>> I wanted to perform temporal correlation as given in the Gradsaholic
>>>>> website
>>>>> *http://gradsaddict.blogspot.in/2013/05/tutorial-use-tcorr-function-to-create.html
>>>>> <http://gradsaddict.blogspot.in/2013/05/tutorial-use-tcorr-function-to-create.html>,*
>>>>> http://gradsaddict.blogspot.in/2013/05/tutorial-use-tcorr-function-to-create.html,
>>>>> but I get an error when the time series variable is defined.
>>>>> Given
>>>>>
>>>>> *set t 100 220*
>>>>> *set lat -90 -50*
>>>>> *set lon 0 360*
>>>>> *ts_var=z*
>>>>>
>>>>> I have defined the settings as mentioned above, where the last line
>>>>> shows an error.
>>>>> Im unable save the timeseries in the variable.
>>>>>
>>>>> Any help is highly appreciated!
>>>>>
>>>>> _______________________________________________
>>>>> gradsusr mailing list
>>>>> gradsusr at gradsusr.org
>>>>> http://gradsusr.org/mailman/listinfo/gradsusr
>>>>>
>>>>>
>>>>
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>>>>
>>>
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>>
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>
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