[gradsusr] accumlate( combine) data into monthly or seasonal using grads for percipitation satellite products

[Marwan Kheimi]

Dear Jennifer,

I am having trouble with the 
DSET ^ filepath\ %y4\m2\d2_3hr-cpc+comb 
When i try doing this line in the DSET
For 3 hr it always give error. However, when I set it to the exact name of one file works. 
If you could help with that i would appreciate it. I am trying to read aggregate/several files with one control file. After that I can set t to any date I want to accumulate for.   



Kind regards,
Marwan Kheimi

On Feb 15, 2013, at 10:23 AM, "Jennifer Adams" <jma at cola.iges.org> wrote:

> 
> On Feb 14, 2013, at 6:05 AM, Marwan Kheimi wrote:
> 
>> Hi guys,
>>  
>> I need help with this control file to find the average monthly precipitation for this control file but the problem is I don’t know what is the proper way to do it.
>> How to accumulate the values using Grads codes ?
> To get the accumulated precip over a month (e.g. Jan 1998) use the sum() function. For the mean, use the ave() function. Documentation is at http://iges.org/grads/gadoc/gradfuncave.html and http://iges.org/grads/gadoc/gradfuncsum.html
> accum = sum(cmorph,time=1jan1998,31jan1998)
> mean = ave(cmorph,time=1jan1998,31jan1998)
> 
>> Also, if any one could help me to find the root square coefficient
> Look at the final example in the ave() documetation. 
> --Jennifer
> 
> 
>> this a daily file temporal scale.
>> chsub  t1  t2  string
>> Some how I have to use this script however I am new to grads please if any could help me I would really appreciate it
>> I also, somehow know that the grip. file could be another solution to figure it out. 
>> DSET ../0.25deg-DLY_00Z/%y4/%y4%m2/CMORPH_V1.0_RAW_0.25deg-DLY_00Z_%y4%m2%d2  
>> TITLE  CMORPH Version 1.0BETA Version, daily precip from 00Z-24Z 
>> OPTIONS template little_endian
>> UNDEF  -999.0
>> XDEF 1440 LINEAR    0.125  0.25
>> YDEF  480 LINEAR  -59.875  0.25
>> ZDEF   01 LEVELS 1
>> TDEF 99999 LINEAR  01jan1998 1dy 
>> VARS 1
>> cmorph   1   99 yyyyy CMORPH Version 1.o daily precipitation (mm)  
>> ENDVARS
>>  
>>  
>> kind regards, 
>> Marawn 
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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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