[gradsusr] Problem to plot a figure in GrAds from gaussian latitude grid

Fri Dec 23 09:35:15 EST 2011

If this were my problem, I would use a tool like 'od' to find out if there was a hidden character in the descriptor file. The numbers in the YDEF statement are read by the strtod() routine, the GrADS code looks for space or /t (tab) in between, and it returns errors if it finds /n, /0, or /r. It may matter whether you're using windows or unix, and it may also matter if you are using 1.9. I would also try creating a new descriptor, not editing the old one, in a brand new file. Make sure you have 64 numbers following 'ydef 64 levels'. --Jennifer

On Dec 23, 2011, at 7:18 AM, Jose Augusto Paixão Veiga wrote:

> Ok, thank you Jeff. I'll wait for Arlindo or Jennifer possible contact. I believe they know how to fix it.
> 
>  
> José Augusto P. Veiga, 
> 
> ======================================
> Universidade do Estado do Amazonas 
> Departamento de Meteorologia
> Escola Superior de Tecnologia (EST)
> -----------------------------------------------------------------------------
> Av. Darcy Vargas, 1200, Manaus-AM Brasil
> Work phone:    (92) 3878 4333
> Skype: veiga_j.a.p.
> -----------------------------------------------------------------------------
> CV: http://lattes.cnpq.br/4027612512091565
> URL:http://scientificmet.wordpress.com/
> http://nmet.wordpress.com/
> -----------------------------------------------------------------------------
> 
> On Dec 22, 2011, at 11:41 PM, Jeff Duda wrote:
> 
>> Jose,
>> No, I don't know any other tricks. Like I said, this sounds like a parsing error when Grads reads the control file.  Arlindo or Jennifer will probably have the answer.
>> 
>> Jeff
>> 
>> On Thu, Dec 22, 2011 at 5:20 PM, Jose Augusto Paixão Veiga <veiga.uea at gmail.com> wrote:
>> Yes Jeff.
>> I tried use a different number like 73.9480 and GrAds split it into 73 and .9480. So, I used 73.0 instead of the original value of 73.9475 (after your hint) and GrAds produced the values 73 and .0
>> 
>> I really don't know what could be happening.
>> 
>> Any other hint Jeff? 
>> 
>> Thanks,
>> 
>> José Augusto P. Veiga, 
>> 
>> ======================================
>> Universidade do Estado do Amazonas 
>> Departamento de Meteorologia
>> Escola Superior de Tecnologia (EST)
>> -----------------------------------------------------------------------------
>> Av. Darcy Vargas, 1200, Manaus-AM Brasil
>> Work phone:    (92) 3878 4333
>> Skype: veiga_j.a.p.
>> -----------------------------------------------------------------------------
>> CV: http://lattes.cnpq.br/4027612512091565
>> URL:http://scientificmet.wordpress.com/
>> http://nmet.wordpress.com/
>> -----------------------------------------------------------------------------
>> 
>> On Dec 22, 2011, at 6:59 PM, Jeff Duda wrote:
>> 
>>> Jose,
>>> Have you tried using other numbers that are similar to 73.9475 but have fewer digits?  It sounds like some odd parsing error.
>>> 
>>> Jeff Duda
>>> 
>>> On Thu, Dec 22, 2011 at 4:11 PM, Jose Augusto Paixão Veiga <veiga.uea at gmail.com> wrote:
>>> Dear all,
>>> 
>>> I am facing the following problem in GrAds:
>>> 
>>> After producing my CTL file and plotted the results I get surprised with plot result (Figure in attach).   Note that the fifth point from the last latitude is shifted for the equatorial latitude. So, I decided to use the command q ctlinfo to get some information about the latitudes ingested by GrAds after I've been opened the CTL file. Them, I realize that GrAds "make" some confusing with one specific latitude point.   Pay attention,
>>> 
>>> This is a part of the result from the command q ctlinfo :
>>> 
>>> xdef 1 linear 1 1
>>> ydef 64 levels -87.8638 -85.0965 -82.3129 -79.5256 -76.7369 -73.9475 -71.1577 -68.3678
>>>  -65.5776 -62.7873 -59.997 -57.2066 -54.4162 -51.6257 -48.8352 -46.0447 -43.2542 -40.4636
>>>  -37.6731 -34.8825 -32.0919 -29.3014 -26.5108 -23.7202 -20.9296 -18.139 -15.3484 -12.5578
>>>  -9.76715 -6.97653 -4.18592 -1.39531 1.39531 4.18592 6.97653 9.76715 12.5578 15.3484
>>>  18.139 20.9296 23.7202 26.5108 29.3014 32.0919 34.8825 37.6731 40.4636 43.2542
>>>  46.0447 48.8352 51.6257 54.4162 57.2066 59.997 62.7873 65.5776 68.3678 71.1577
>>>  73 0.9475 76.7369 79.5256 82.3129 85.0965
>>> zdef 1 linear 1 1
>>> 
>>> Thus, GrAds separates one latitude value into two others. I told this because the latitude point 73.9475 is duplicated into the points 73 and 0.9475. When I change the value for the integer 73 everything goes well and the value is not shifted for the "center of figure". However I wouldn't like to to this all the time I face this.
>>> 
>>> I would appreciate any hint and help.  I don't know what is producing this split in the latitude value.
>>> 
>>> 
>>> This is part of my ctl file 
>>> 
>>> title CNRM  model output prepared for IPCC Fourth Assessment climate of the 20th Century experiment (20C3M)
>>> xdef 1 linear 1 1
>>> ydef   64 levels -87.8638 -85.0965 -82.3129 -79.5256 -76.7369 -73.9475 -71.1577 -68.3678 -65.5776 -62.7873 -59.997 -57.2066 -54.4162 -51.6257 -48.8352 -46.0447 -43.2542 -40.4636 -37.6731 -34.8825 -32.0919 -29.3014 -26.5108 -23.7202 -20.9296 -18.139 -15.3484 -12.5578 -9.76715 -6.97653 -4.18592 -1.39531 1.39531 4.18592 6.97653 9.76715 12.5578 15.3484 18.139 20.9296 23.7202 26.5108 29.3014 32.0919 34.8825 37.6731 40.4636 43.2542 46.0447 48.8352 51.6257 54.4162 57.2066 59.997 62.7873 65.5776 68.3678 71.1577 73.9475  76.7369 79.5256 82.3129 85.0965 87.8638 
>>> zdef 1 linear 1 1
>>> tdef 252 linear JAN1979 1MO
>>> vars  17
>>> gz 0 33,100 generation of available potential energy
>>> 
>>> 
>>> Cheers,
>>> 
>>> 
>>> José Augusto P. Veiga, 
>>> 
>>> ======================================
>>> Universidade do Estado do Amazonas 
>>> Departamento de Meteorologia
>>> Escola Superior de Tecnologia (EST)
>>> -----------------------------------------------------------------------------
>>> Av. Darcy Vargas, 1200, Manaus-AM Brasil
>>> Work phone:    (92) 3878 4333
>>> Skype: veiga_j.a.p.
>>> -----------------------------------------------------------------------------
>>> CV: http://lattes.cnpq.br/4027612512091565
>>> URL:http://scientificmet.wordpress.com/
>>> http://nmet.wordpress.com/
>>> -----------------------------------------------------------------------------
>>> 
>>> 
>>> 
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>>> 
>>> 
>>> 
>>> -- 
>>> Jeff Duda
>>> Graduate research assistant
>>> University of Oklahoma School of Meteorology
>>> Center for Analysis and Prediction of Storms
>>> 
>>> _______________________________________________
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>>> gradsusr at gradsusr.org
>>> http://gradsusr.org/mailman/listinfo/gradsusr
>> 
>> 
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>> 
>> 
>> 
>> -- 
>> Jeff Duda
>> Graduate research assistant
>> University of Oklahoma School of Meteorology
>> Center for Analysis and Prediction of Storms
>> 
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> 
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--
Jennifer M. Adams
IGES/COLA
4041 Powder Mill Road, Suite 302
Calverton, MD 20705
jma at cola.iges.org

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