[gradsusr] regrid data

[Arlindo da Silva]

Sent from my iPhone

On Feb 13, 2012, at 11:18 AM, Robert Seigel <rseigel at atmos.colostate.edu> wrote:

> Hi Liban, Sam, and Mike,
>
> Thank you for the responses.
>
> I am currently running opengrads 2.0.1 and still unable to access the regrid2 functions.

I can help you with that but I'll need more information. For example,
the output of

ga-> q config
ga-> q udxt

  Arlindo


> However, I have figured out a workaround using wgrib2. With wgrib2, I am successfully able to interpolate the NAM grid to the more coarse GFS grid for more objective comparisons.
>
> Thanks again,
> Rob
>
> On Feb 12, 2012, at 4:12 PM, Michael Fiorino wrote:
>
>> Rob and Liban,
>>
>> the key point is that re2 and re are not grads scripts but grads
>> external functions, i.e., they are external code accessed from within
>> grads is if they were built into grads itself.  an example of an
>> 'intrinsic' or built-in grads function is 'aave'.
>>
>> /*only opengrads2.0 supports external functions like my regrid2 (original
>> user defined function for grads 1.X) that is now called 're2' in the
>> opengrads2.0*/.
>>
>> let me know if you have problems Rob, but it should work if you use
>> opengrads2.0.
>>
>> also, re2 (using re defaults) does 'appropriate' regriding.  the general
>> practice is to use area-average regriding (perserves area averages, or
>> what i call 'box averaging', the 'ba' option in re2/re) when regriding
>> from fine to coarse grids (e.g., 0.5 deg -> 2.5 deg).  but for coarse ->
>> fine Nth order interp is better (re2/re this is 3rd order bessel
>> interpolation) re2/re selects the appropriate method that can be
>> overridden as needed see:
>>
>> re:   http://opengrads.org/doc/udxt/re/
>> re2:  http://ruc.noaa.gov/fiorino/grads/re2.txt
>>
>> ciao ciao 4 now, Mike
>>
>> On 2012-02-10 09:36, Yan Libin wrote:
>>> Rob,
>>>
>>> You can download OpenGrADS from this link
>>> http://sourceforge.net/projects/opengrads/files/grads2/2.0.1.oga.1/Linux/
>>> I guess this bundle has regrid function (re2) after you install it.
>>> It is not a script under windows platform, so maybe the same under linux platform.
>>> After installation, you can do like this:
>>>
>>> define var1=re2(var,1,1)
>>> d var1
>>>
>>> You can have a try.
>>> Good luck.
>>>
>>> Libin
>>> Yan Libin
>>>
>>> From: Robert Seigel
>>> Date: 2012-02-11 00:28
>>> To: zjuyanlibin; GrADS Users Forum
>>> Subject: Re: [gradsusr] regrid data
>>> I am using a Linux platform with grads-2.0.a9. Is there a linux script?
>>>
>>> Rob
>>>
>>> On Feb 10, 2012, at 9:26 AM, Yan Libin wrote:
>>>
>>>> If you are working on a windows platform, you can download OpenGrADS which has the regrid
>> function already.
>>>>
>>>> Yan Libin
>>>>
>>>> From: Robert Seigel
>>>> Date: 2012-02-11 00:22
>>>> To: zjuyanlibin; GrADS Users Forum
>>>> Subject: Re: [gradsusr] regrid data
>>>> Thank you for the quick response, Yan.
>>>>
>>>> When I type that, I get the following response from grads:
>>>>
>>>> Syntax Error: Invalid Operand
>>>> 're2' not a variable or function name
>>>> Error ocurred at column 1
>>>> DEFINE error: Invalid expression.
>>>>
>>>> Do you have a copy of the re2() script?
>>>>
>>>> Thanks,
>>>> Rob
>>>>
>>>> On Feb 10, 2012, at 9:17 AM, Yan Libin wrote:
>>>>
>>>>> define varnew=re2(varold,1,1)
>>>>>
>>>>> Yan Libin
>>>>>
>>>>> From: Robert Seigel
>>>>> Date: 2012-02-11 00:15
>>>>> To: gradsusr
>>>>> Subject: [gradsusr] regrid data
>>>>> Hi,
>>>>>
>>>>> I am trying to regrid NAM data to match up with GFS resolution. I have seen numerous
>> posts regarding regrid2() or re(), however I cannot seem to find any of these scripts. I
>> have downloaded a bundle and found regrid2(), but could not get it to work. It gave me
>> errors similar to previous posts ('regrid2' not a variable or function name). Does anyone
>> have (or know where to find) a script that regrids data to a more coarse resolution?
>>>>>
>>>>> Thanks,
>>>>> Rob
>>>>> _______________________________________________
>>>>> gradsusr mailing list
>>>>> gradsusr at gradsusr.org
>>>>> http://gradsusr.org/mailman/listinfo/gradsusr
>>>>> _______________________________________________
>>>>> gradsusr mailing list
>>>>> gradsusr at gradsusr.org
>>>>> http://gradsusr.org/mailman/listinfo/gradsusr
>>>>
>>>> _______________________________________________
>>>> gradsusr mailing list
>>>> gradsusr at gradsusr.org
>>>> http://gradsusr.org/mailman/listinfo/gradsusr
>>>
>>>
>>>
>>> _______________________________________________
>>> gradsusr mailing list
>>> gradsusr at gradsusr.org
>>> http://gradsusr.org/mailman/listinfo/gradsusr
>>
>> _______________________________________________
>> gradsusr mailing list
>> gradsusr at gradsusr.org
>> http://gradsusr.org/mailman/listinfo/gradsusr
>
>
> _______________________________________________
> gradsusr mailing list
> gradsusr at gradsusr.org
> http://gradsusr.org/mailman/listinfo/gradsusr